EP3638749B1 - Organic molecule, in particular for use in optoelectronic devices - Google Patents
Organic molecule, in particular for use in optoelectronic devices Download PDFInfo
- Publication number
- EP3638749B1 EP3638749B1 EP18737153.9A EP18737153A EP3638749B1 EP 3638749 B1 EP3638749 B1 EP 3638749B1 EP 18737153 A EP18737153 A EP 18737153A EP 3638749 B1 EP3638749 B1 EP 3638749B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- optionally substituted
- substituents
- group
- deuterium
- organic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000005693 optoelectronics Effects 0.000 title claims description 32
- 125000001424 substituent group Chemical group 0.000 claims description 142
- 229910052799 carbon Inorganic materials 0.000 claims description 108
- 229910052717 sulfur Inorganic materials 0.000 claims description 74
- 229910052760 oxygen Inorganic materials 0.000 claims description 73
- 239000000126 substance Substances 0.000 claims description 63
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 claims description 44
- 229910052805 deuterium Inorganic materials 0.000 claims description 44
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 22
- 229910052739 hydrogen Inorganic materials 0.000 claims description 19
- 239000001257 hydrogen Substances 0.000 claims description 15
- 229910052757 nitrogen Inorganic materials 0.000 claims description 14
- 125000003118 aryl group Chemical group 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 13
- 239000000758 substrate Substances 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 239000002904 solvent Substances 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 229910052731 fluorine Inorganic materials 0.000 claims description 10
- 150000002431 hydrogen Chemical class 0.000 claims description 10
- 239000000243 solution Substances 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 9
- 125000006527 (C1-C5) alkyl group Chemical group 0.000 claims description 8
- 125000006749 (C6-C60) aryl group Chemical group 0.000 claims description 7
- 229910052794 bromium Inorganic materials 0.000 claims description 7
- 229910052740 iodine Inorganic materials 0.000 claims description 7
- XSXHWVKGUXMUQE-UHFFFAOYSA-N osmium dioxide Inorganic materials O=[Os]=O XSXHWVKGUXMUQE-UHFFFAOYSA-N 0.000 claims description 7
- 125000004648 C2-C8 alkenyl group Chemical group 0.000 claims description 6
- 125000004649 C2-C8 alkynyl group Chemical group 0.000 claims description 6
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 5
- 230000005669 field effect Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 4
- 125000006413 ring segment Chemical group 0.000 claims description 4
- 125000004122 cyclic group Chemical group 0.000 claims description 3
- 239000000975 dye Substances 0.000 claims description 3
- 125000003367 polycyclic group Chemical group 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 239000000376 reactant Substances 0.000 claims description 3
- 125000003944 tolyl group Chemical group 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 125000006729 (C2-C5) alkenyl group Chemical group 0.000 claims description 2
- 125000006730 (C2-C5) alkynyl group Chemical group 0.000 claims description 2
- UQRONKZLYKUEMO-UHFFFAOYSA-N 4-methyl-1-(2,4,6-trimethylphenyl)pent-4-en-2-one Chemical group CC(=C)CC(=O)Cc1c(C)cc(C)cc1C UQRONKZLYKUEMO-UHFFFAOYSA-N 0.000 claims description 2
- 125000001931 aliphatic group Chemical group 0.000 claims description 2
- 125000002950 monocyclic group Chemical group 0.000 claims description 2
- 150000002894 organic compounds Chemical class 0.000 claims description 2
- 125000000951 phenoxy group Chemical group [H]C1=C([H])C([H])=C(O*)C([H])=C1[H] 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 claims description 2
- 238000001771 vacuum deposition Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 118
- -1 s-pentyl Chemical group 0.000 description 61
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 40
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 39
- 238000004770 highest occupied molecular orbital Methods 0.000 description 31
- 150000001875 compounds Chemical class 0.000 description 27
- 238000004768 lowest unoccupied molecular orbital Methods 0.000 description 27
- 238000000295 emission spectrum Methods 0.000 description 26
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 23
- 239000004926 polymethyl methacrylate Substances 0.000 description 23
- 238000006862 quantum yield reaction Methods 0.000 description 15
- 150000002148 esters Chemical class 0.000 description 13
- 230000005525 hole transport Effects 0.000 description 11
- 238000005424 photoluminescence Methods 0.000 description 11
- 239000002253 acid Substances 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 10
- 238000003786 synthesis reaction Methods 0.000 description 10
- XESMNQMWRSEIET-UHFFFAOYSA-N 2,9-dinaphthalen-2-yl-4,7-diphenyl-1,10-phenanthroline Chemical compound C1=CC=CC=C1C1=CC(C=2C=C3C=CC=CC3=CC=2)=NC2=C1C=CC1=C(C=3C=CC=CC=3)C=C(C=3C=C4C=CC=CC4=CC=3)N=C21 XESMNQMWRSEIET-UHFFFAOYSA-N 0.000 description 9
- AWXGSYPUMWKTBR-UHFFFAOYSA-N 4-carbazol-9-yl-n,n-bis(4-carbazol-9-ylphenyl)aniline Chemical compound C12=CC=CC=C2C2=CC=CC=C2N1C1=CC=C(N(C=2C=CC(=CC=2)N2C3=CC=CC=C3C3=CC=CC=C32)C=2C=CC(=CC=2)N2C3=CC=CC=C3C3=CC=CC=C32)C=C1 AWXGSYPUMWKTBR-UHFFFAOYSA-N 0.000 description 8
- 241001634120 Adeno-associated virus - 5 Species 0.000 description 8
- 125000001072 heteroaryl group Chemical group 0.000 description 8
- 238000005259 measurement Methods 0.000 description 8
- 125000004306 triazinyl group Chemical group 0.000 description 8
- 0 *c1ccc(c(cccc2)c2[n]2*)c2c1 Chemical compound *c1ccc(c(cccc2)c2[n]2*)c2c1 0.000 description 7
- MMNNWKCYXNXWBG-UHFFFAOYSA-N 2,4,6-tris(3-phenylphenyl)-1,3,5-triazine Chemical compound C1=CC=CC=C1C1=CC=CC(C=2N=C(N=C(N=2)C=2C=C(C=CC=2)C=2C=CC=CC=2)C=2C=C(C=CC=2)C=2C=CC=CC=2)=C1 MMNNWKCYXNXWBG-UHFFFAOYSA-N 0.000 description 7
- 101000837344 Homo sapiens T-cell leukemia translocation-altered gene protein Proteins 0.000 description 7
- 102100028692 T-cell leukemia translocation-altered gene protein Human genes 0.000 description 7
- 238000000589 high-performance liquid chromatography-mass spectrometry Methods 0.000 description 7
- 230000014759 maintenance of location Effects 0.000 description 7
- ATTVYRDSOVWELU-UHFFFAOYSA-N 1-diphenylphosphoryl-2-(2-diphenylphosphorylphenoxy)benzene Chemical compound C=1C=CC=CC=1P(C=1C(=CC=CC=1)OC=1C(=CC=CC=1)P(=O)(C=1C=CC=CC=1)C=1C=CC=CC=1)(=O)C1=CC=CC=C1 ATTVYRDSOVWELU-UHFFFAOYSA-N 0.000 description 6
- YEWVLWWLYHXZLZ-UHFFFAOYSA-N 9-(3-dibenzofuran-2-ylphenyl)carbazole Chemical compound C1=CC=C2C3=CC(C=4C=CC=C(C=4)N4C5=CC=CC=C5C5=CC=CC=C54)=CC=C3OC2=C1 YEWVLWWLYHXZLZ-UHFFFAOYSA-N 0.000 description 6
- UJOBWOGCFQCDNV-UHFFFAOYSA-N 9H-carbazole Chemical compound C1=CC=C2C3=CC=CC=C3NC2=C1 UJOBWOGCFQCDNV-UHFFFAOYSA-N 0.000 description 6
- 241001655883 Adeno-associated virus - 1 Species 0.000 description 6
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
- PKYADCLPLQPPKK-UHFFFAOYSA-N 3-bromo-4-fluoropyridine Chemical compound FC1=CC=NC=C1Br PKYADCLPLQPPKK-UHFFFAOYSA-N 0.000 description 5
- BEQUUSCRAKEKQM-UHFFFAOYSA-N 4-chloro-3-fluoropyridine Chemical compound FC1=CN=CC=C1Cl BEQUUSCRAKEKQM-UHFFFAOYSA-N 0.000 description 5
- 241000702423 Adeno-associated virus - 2 Species 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 5
- WIHKEPSYODOQJR-UHFFFAOYSA-N [9-(4-tert-butylphenyl)-6-triphenylsilylcarbazol-3-yl]-triphenylsilane Chemical compound C1=CC(C(C)(C)C)=CC=C1N1C2=CC=C([Si](C=3C=CC=CC=3)(C=3C=CC=CC=3)C=3C=CC=CC=3)C=C2C2=CC([Si](C=3C=CC=CC=3)(C=3C=CC=CC=3)C=3C=CC=CC=3)=CC=C21 WIHKEPSYODOQJR-UHFFFAOYSA-N 0.000 description 5
- 150000001716 carbazoles Chemical class 0.000 description 5
- 125000005842 heteroatom Chemical group 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000012299 nitrogen atmosphere Substances 0.000 description 5
- 125000004076 pyridyl group Chemical group 0.000 description 5
- 238000001161 time-correlated single photon counting Methods 0.000 description 5
- TXBFHHYSJNVGBX-UHFFFAOYSA-N (4-diphenylphosphorylphenyl)-triphenylsilane Chemical compound C=1C=CC=CC=1P(C=1C=CC(=CC=1)[Si](C=1C=CC=CC=1)(C=1C=CC=CC=1)C=1C=CC=CC=1)(=O)C1=CC=CC=C1 TXBFHHYSJNVGBX-UHFFFAOYSA-N 0.000 description 4
- VFUDMQLBKNMONU-UHFFFAOYSA-N 9-[4-(4-carbazol-9-ylphenyl)phenyl]carbazole Chemical compound C12=CC=CC=C2C2=CC=CC=C2N1C1=CC=C(C=2C=CC(=CC=2)N2C3=CC=CC=C3C3=CC=CC=C32)C=C1 VFUDMQLBKNMONU-UHFFFAOYSA-N 0.000 description 4
- 229910016460 CzSi Inorganic materials 0.000 description 4
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 4
- 239000007983 Tris buffer Substances 0.000 description 4
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 4
- TXCDCPKCNAJMEE-UHFFFAOYSA-N dibenzofuran Chemical compound C1=CC=C2C3=CC=CC=C3OC2=C1 TXCDCPKCNAJMEE-UHFFFAOYSA-N 0.000 description 4
- DKHNGUNXLDCATP-UHFFFAOYSA-N dipyrazino[2,3-f:2',3'-h]quinoxaline-2,3,6,7,10,11-hexacarbonitrile Chemical compound C12=NC(C#N)=C(C#N)N=C2C2=NC(C#N)=C(C#N)N=C2C2=C1N=C(C#N)C(C#N)=N2 DKHNGUNXLDCATP-UHFFFAOYSA-N 0.000 description 4
- 230000005284 excitation Effects 0.000 description 4
- 230000005281 excited state Effects 0.000 description 4
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 4
- 229920001467 poly(styrenesulfonates) Polymers 0.000 description 4
- 229960002796 polystyrene sulfonate Drugs 0.000 description 4
- 239000011970 polystyrene sulfonate Substances 0.000 description 4
- 125000000714 pyrimidinyl group Chemical group 0.000 description 4
- 239000011541 reaction mixture Substances 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- TVIVIEFSHFOWTE-UHFFFAOYSA-K tri(quinolin-8-yloxy)alumane Chemical compound [Al+3].C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1 TVIVIEFSHFOWTE-UHFFFAOYSA-K 0.000 description 4
- XOYZGLGJSAZOAG-UHFFFAOYSA-N 1-n,1-n,4-n-triphenyl-4-n-[4-[4-(n-[4-(n-phenylanilino)phenyl]anilino)phenyl]phenyl]benzene-1,4-diamine Chemical compound C1=CC=CC=C1N(C=1C=CC(=CC=1)N(C=1C=CC=CC=1)C=1C=CC(=CC=1)C=1C=CC(=CC=1)N(C=1C=CC=CC=1)C=1C=CC(=CC=1)N(C=1C=CC=CC=1)C=1C=CC=CC=1)C1=CC=CC=C1 XOYZGLGJSAZOAG-UHFFFAOYSA-N 0.000 description 3
- SPDPTFAJSFKAMT-UHFFFAOYSA-N 1-n-[4-[4-(n-[4-(3-methyl-n-(3-methylphenyl)anilino)phenyl]anilino)phenyl]phenyl]-4-n,4-n-bis(3-methylphenyl)-1-n-phenylbenzene-1,4-diamine Chemical compound CC1=CC=CC(N(C=2C=CC(=CC=2)N(C=2C=CC=CC=2)C=2C=CC(=CC=2)C=2C=CC(=CC=2)N(C=2C=CC=CC=2)C=2C=CC(=CC=2)N(C=2C=C(C)C=CC=2)C=2C=C(C)C=CC=2)C=2C=C(C)C=CC=2)=C1 SPDPTFAJSFKAMT-UHFFFAOYSA-N 0.000 description 3
- MQRCTQVBZYBPQE-UHFFFAOYSA-N 189363-47-1 Chemical compound C1=CC=CC=C1N(C=1C=C2C3(C4=CC(=CC=C4C2=CC=1)N(C=1C=CC=CC=1)C=1C=CC=CC=1)C1=CC(=CC=C1C1=CC=C(C=C13)N(C=1C=CC=CC=1)C=1C=CC=CC=1)N(C=1C=CC=CC=1)C=1C=CC=CC=1)C1=CC=CC=C1 MQRCTQVBZYBPQE-UHFFFAOYSA-N 0.000 description 3
- GKWLILHTTGWKLQ-UHFFFAOYSA-N 2,3-dihydrothieno[3,4-b][1,4]dioxine Chemical compound O1CCOC2=CSC=C21 GKWLILHTTGWKLQ-UHFFFAOYSA-N 0.000 description 3
- PWJYOTPKLOICJK-UHFFFAOYSA-N 2-methyl-9h-carbazole Chemical compound C1=CC=C2C3=CC=C(C)C=C3NC2=C1 PWJYOTPKLOICJK-UHFFFAOYSA-N 0.000 description 3
- WPUSEOSICYGUEW-UHFFFAOYSA-N 4-[4-(4-methoxy-n-(4-methoxyphenyl)anilino)phenyl]-n,n-bis(4-methoxyphenyl)aniline Chemical compound C1=CC(OC)=CC=C1N(C=1C=CC(=CC=1)C=1C=CC(=CC=1)N(C=1C=CC(OC)=CC=1)C=1C=CC(OC)=CC=1)C1=CC=C(OC)C=C1 WPUSEOSICYGUEW-UHFFFAOYSA-N 0.000 description 3
- ZLHINBZEEMIWIR-UHFFFAOYSA-N 9-(3-dibenzothiophen-2-ylphenyl)carbazole Chemical compound C1=CC=C2C3=CC(C=4C=CC=C(C=4)N4C5=CC=CC=C5C5=CC=CC=C54)=CC=C3SC2=C1 ZLHINBZEEMIWIR-UHFFFAOYSA-N 0.000 description 3
- WHMHUGLMCAFKFE-UHFFFAOYSA-N 9-[3,5-di(dibenzofuran-2-yl)phenyl]carbazole Chemical compound C1=CC=C2C3=CC(C=4C=C(C=C(C=4)N4C5=CC=CC=C5C5=CC=CC=C54)C4=CC=C5OC=6C(C5=C4)=CC=CC=6)=CC=C3OC2=C1 WHMHUGLMCAFKFE-UHFFFAOYSA-N 0.000 description 3
- XVBYZOSXOUDFKJ-UHFFFAOYSA-N 9-[3,5-di(dibenzothiophen-2-yl)phenyl]carbazole Chemical compound C1=C(C=CC=2SC3=C(C=21)C=CC=C3)C=1C=C(C=C(C=1)C1=CC2=C(SC3=C2C=CC=C3)C=C1)N1C2=CC=CC=C2C=2C=CC=CC1=2 XVBYZOSXOUDFKJ-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000003775 Density Functional Theory Methods 0.000 description 3
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 125000003545 alkoxy group Chemical group 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000004305 biphenyl Substances 0.000 description 3
- 125000005620 boronic acid group Chemical class 0.000 description 3
- 125000000609 carbazolyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3NC12)* 0.000 description 3
- 238000002484 cyclic voltammetry Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 3
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 3
- 239000002019 doping agent Substances 0.000 description 3
- GVEPBJHOBDJJJI-UHFFFAOYSA-N fluoranthrene Natural products C1=CC(C2=CC=CC=C22)=C3C2=CC=CC3=C1 GVEPBJHOBDJJJI-UHFFFAOYSA-N 0.000 description 3
- 239000012634 fragment Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 150000002367 halogens Chemical class 0.000 description 3
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 3
- 235000012736 patent blue V Nutrition 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 3
- 229940062627 tribasic potassium phosphate Drugs 0.000 description 3
- LWIHDJKSTIGBAC-UHFFFAOYSA-K tripotassium phosphate Chemical compound [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 3
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 2
- FCEHBMOGCRZNNI-UHFFFAOYSA-N 1-benzothiophene Chemical compound C1=CC=C2SC=CC2=C1 FCEHBMOGCRZNNI-UHFFFAOYSA-N 0.000 description 2
- FQABTURRFUZZBZ-UHFFFAOYSA-N 2,4,6-tris(9,9'-spirobi[fluorene]-2-yl)-1,3,5-triazine Chemical compound C12=CC=CC=C2C2=CC=CC=C2C1(C1=C2)C3=CC=CC=C3C1=CC=C2C1=NC(C=2C=C3C4(C5=CC=CC=C5C5=CC=CC=C54)C4=CC=CC=C4C3=CC=2)=NC(C2=CC=C3C4=CC=CC=C4C4(C3=C2)C2=CC=CC=C2C=2C4=CC=CC=2)=N1 FQABTURRFUZZBZ-UHFFFAOYSA-N 0.000 description 2
- STTGYIUESPWXOW-UHFFFAOYSA-N 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline Chemical compound C=12C=CC3=C(C=4C=CC=CC=4)C=C(C)N=C3C2=NC(C)=CC=1C1=CC=CC=C1 STTGYIUESPWXOW-UHFFFAOYSA-N 0.000 description 2
- IXHWGNYCZPISET-UHFFFAOYSA-N 2-[4-(dicyanomethylidene)-2,3,5,6-tetrafluorocyclohexa-2,5-dien-1-ylidene]propanedinitrile Chemical compound FC1=C(F)C(=C(C#N)C#N)C(F)=C(F)C1=C(C#N)C#N IXHWGNYCZPISET-UHFFFAOYSA-N 0.000 description 2
- KESUTBOSNOHAMK-UHFFFAOYSA-N 3-bromo-2-fluoropyridine Chemical compound FC1=NC=CC=C1Br KESUTBOSNOHAMK-UHFFFAOYSA-N 0.000 description 2
- IHGMHTQDGNVKTA-UHFFFAOYSA-N 3-chloro-2-fluoropyridine Chemical group FC1=NC=CC=C1Cl IHGMHTQDGNVKTA-UHFFFAOYSA-N 0.000 description 2
- PHKYYUQQYARDIU-UHFFFAOYSA-N 3-methyl-9h-carbazole Chemical compound C1=CC=C2C3=CC(C)=CC=C3NC2=C1 PHKYYUQQYARDIU-UHFFFAOYSA-N 0.000 description 2
- ZOKIJILZFXPFTO-UHFFFAOYSA-N 4-methyl-n-[4-[1-[4-(4-methyl-n-(4-methylphenyl)anilino)phenyl]cyclohexyl]phenyl]-n-(4-methylphenyl)aniline Chemical compound C1=CC(C)=CC=C1N(C=1C=CC(=CC=1)C1(CCCCC1)C=1C=CC(=CC=1)N(C=1C=CC(C)=CC=1)C=1C=CC(C)=CC=1)C1=CC=C(C)C=C1 ZOKIJILZFXPFTO-UHFFFAOYSA-N 0.000 description 2
- KDCGOANMDULRCW-UHFFFAOYSA-N 7H-purine Chemical compound N1=CNC2=NC=NC2=C1 KDCGOANMDULRCW-UHFFFAOYSA-N 0.000 description 2
- 229920001621 AMOLED Polymers 0.000 description 2
- 241000202702 Adeno-associated virus - 3 Species 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- SIKJAQJRHWYJAI-UHFFFAOYSA-N Indole Chemical compound C1=CC=C2NC=CC2=C1 SIKJAQJRHWYJAI-UHFFFAOYSA-N 0.000 description 2
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
- C07D401/14—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing three or more hetero rings
-
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Definitions
- the invention relates to organic molecules and their use in organic light-emitting diodes (OLEDs) and in other optoelectronic devices.
- the object of the present invention is to provide molecules which are suitable for use in optoelectronic devices.
- EP3113239A1 describes organic compounds useful in OLEDs.
- the organic molecules are purely organic molecules, i.e. they do not contain any metal ions in contrast to metal complexes known for use in optoelectronic devices.
- the organic molecules exhibit emission maxima in the blue, sky-blue or green spectral range.
- the organic molecules exhibit in particular emission maxima between 420 nm and 520 nm, preferably between 440 nm and 495 nm, more preferably between 450 nm and 470 nm.
- the photoluminescence quantum yields of the organic molecules according to the invention are, in particular, 20 % or more.
- the molecules according to the invention exhibit in particular thermally activated delayed fluorescence (TADF).
- TADF thermally activated delayed fluorescence
- OLED organic light-emitting diode
- organic light-emitting molecules of the invention comprise or consist of a first chemical moiety comprising or consisting of a structure of Formula I, and
- the substituents R a , R 3 , R 4 or R 5 independently from each other can optionally form a mono- or polycyclic, aliphatic, aromatic and/or benzo-fused ring system with one or more substituents R a , R 3 , R 4 or R 5 .
- exactly one ring atom selected from the group consisting of L T , L V and L W is N; exactly one substituent selected from the group consisting of R T , R V and R W is CN; exactly one substituent selected from the group consisting of W, Y and X represents the binding site of a single bond linking the first chemical moiety and one of the two second chemical moieties and exactly one substituent selected from the group consisting of R W , R Y and R X represents the binding site of a single bond linking the first chemical moiety and one of the two second chemical moieties.
- first chemical moiety comprises or consists of a structure of Formula la:
- exactly one substituent selected from the group consisting of R T , R V and R Z is CN and exactly one ring atom selected from the group consisting of L T , L V and L Z is N.
- R 1 , R 2 and R I is at each occurrence independently from another selected from the group consisting of hydrogen (H), methyl, mesityl, tolyl and phenyl.
- H hydrogen
- methyl mesityl
- tolyl refers to 2-tolyl, 3-tolyl, and 4-tolyl.
- R 1 , R 2 and R I is at each occurrence independently from another selected from the group consisting of hydrogen (H), methyl, and phenyl.
- R V is CN
- R W is CN
- R Z is CN
- L V is N.
- L W is N.
- L Z is N.
- R V is CN and L V is N.
- R V is CN and L W is N.
- R V is CN and L Z is N.
- R W is CN and L W is N.
- R W is CN and L Z is N.
- R W is CN and L V is N.
- R Z is CN and L W is N.
- R Z is CN and L Z is N.
- R Z is CN and L V is N.
- the two second chemical moieties each at each occurrence independently from another comprise or consist of a structure of Formula Ila: wherein # and R a are defined as above.
- R a is at each occurrence independently from another selected from the group consisting of H,
- R a is at each occurrence independently from another selected from the group consisting of H,
- R a is at each occurrence independently from another selected from the group consisting of H,
- R a is H at each occurrence.
- the two second chemical moieties each at each occurrence independently from another comprise or consist of a structure of Formula IIb, a structure of Formula IIb-2, a structure of Formula IIb-3 or a structure of Formula IIb-4: wherein
- the two second chemical moieties each at each occurrence independently from another comprise or consist of a structure of Formula IIc, a structure of Formula IIc-2, a structure of Formula IIc-3 or a structure of Formula IIc-4: wherein the aforementioned definitions apply.
- R b is at each occurrence independently from another selected from the group consisting of
- R b is at each occurrence independently from another selected from the group consisting of
- R b is at each occurrence independently from another selected from the group consisting of
- R a and R 5 is at each occurrence independently from another selected from the group consisting of hydrogen (H), methyl (Me), i-propyl (CH(CH 3 ) 2 ) ( i Pr), t-butyl ( t Bu), phenyl (Ph), CN, CF 3 , and diphenylamine (NPh 2 ).
- the organic molecules comprise or consist of a structure of Formula III: wherein the aforementioned definitions apply, and wherein exactly one substituent selected from the group consisting of R V , R T and R Z is CN.
- the organic molecules comprise or consist of a structure of Formula III and R V is CN.
- the organic molecules comprise or consist of a structure selected from the group of Formula III-1 and Formula III-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure selected from the group of Formula IIIa-1 and Formula IIIa-2: wherein
- the organic molecules comprise or consist of a structure of Formula IIIa-1.
- the organic molecules comprise or consist of a structure selected from the group of Formula IIIb-1 and Formula IIIb-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula IIIb-1.
- the organic molecules comprise or consist of a structure selected from the group of Formula IIIc-1 and Formula IIIc-2, and Formula IIIc-3: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula IIIc-1.
- the organic molecules comprise or consist of a structure selected from the group of Formula IIId-1 and Formula IIId-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula IIId-1.
- the organic molecules comprise or consist of a structure of Formula IV: wherein the aforementioned definitions apply and wherein exactly one substituent selected from the group consisting of R T , R V and R Z is CN.
- the organic molecules comprise or consist of a structure of Formula IV and R V is CN.
- the organic molecules comprise or consist of a structure selected from the group of Formula IV-1 and Formula IV-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure selected from the group of Formula IVa-1 and Formula IVa-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula IVa-1.
- the organic molecules comprise or consist of a structure selected from the group of Formula IVb-1 and Formula IVb-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula IVb-1.
- the organic molecules comprise or consist of a structure selected from the group of Formula IVc-1 and Formula IVc-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula IVc-1.
- the organic molecules comprise or consist of a structure selected from the group of Formula IVd-1 and Formula IVd-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula IVd-1.
- the organic molecules comprise or consist of a structure of Formula V: wherein the aforementioned definitions apply and wherein exactly one substituent selected from the group consisting of R T , R V and R Z is CN.
- the organic molecules comprise or consist of a structure of Formula V and R V is CN.
- the organic molecules comprise or consist of a structure selected from the group of Formula V-1 and Formula V-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula VI: wherein the aforementioned definitions apply and wherein exactly one substituent selected from the group consisting of R T , R V and R Z is CN.
- the organic molecules comprise or consist of a structure of Formula VI and R V is CN.
- the organic molecules comprise or consist of a structure selected from the group of Formula VI-1 and Formula VI-2: wherein the aforementioned definitions apply.
- the organic molecules comprise or consist of a structure of Formula VII: wherein the aforementioned definitions apply and wherein exactly one substituent selected from the group consisting of R T , R V and R Z is CN.
- the organic molecules comprise or consist of a structure of Formula VII and R V is CN.
- the organic molecules comprise or consist of a structure of Formula VIII: wherein the aforementioned definitions apply and wherein exactly one substituent selected from the group consisting of R T , R V and R Z is CN.
- the organic molecules comprise or consist of a structure of Formula VIII and R V is CN.
- the organic molecules comprise or consist of a structure of Formula IX: wherein the aforementioned definitions apply and wherein exactly one substituent selected from the group consisting of R T , R V and R Z is CN.
- the organic molecules comprise or consist of a structure of Formula IX and R V is CN.
- the organic molecules comprise or consist of a structure of Formula X: wherein the aforementioned definitions apply and wherein exactly one substituent selected from the group consisting of R T , R V and R Z is CN.
- the organic molecules comprise or consist of a structure of Formula X and R V is CN.
- the organic molecules comprise or consist of a structure of Formula XI: wherein the aforementioned definitions apply and wherein exactly one substituent selected from the group consisting of R T , R V and R Z is CN.
- the organic molecules comprise or consist of a structure of Formula XI and R V is CN.
- the organic molecules comprise or consist of a structure of Formula XII: wherein the aforementioned definitions apply and wherein exactly one substituent selected from the group consisting of R T , R V and R Z is CN.
- the organic molecules comprise or consist of a structure of Formula XII and R V is CN.
- the organic molecules comprise or consist of a structure of Formula XIII: wherein the aforementioned definitions apply and wherein exactly one substituent selected from the group consisting of R T , R V and R Z is CN.
- the organic molecules comprise or consist of a structure of Formula XIII and R V is CN.
- the organic molecules comprise or consist of a structure of Formula XIV: wherein the aforementioned definitions apply and wherein exactly one substituent selected from the group consisting of R T , R V and R Z is CN.
- the organic molecules comprise or consist of a structure of Formula XIV and R V is CN.
- the organic molecules comprise or consist of a structure of Formula XV: wherein the aforementioned definitions apply, and wherein exactly one substituent selected from the group consisting of R V , R T and R Z is CN.
- the organic molecules comprise or consist of a structure of Formula XV and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XVI: wherein the aforementioned definitions apply, and wherein exactly one substituent selected from the group consisting of R V , R T and R Z is CN.
- the organic molecules comprise or consist of a structure of Formula XVI and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XVII: wherein the aforementioned definitions apply, and wherein exactly one substituent selected from the group consisting of R V , R T and R Z is CN.
- the organic molecules comprise or consist of a structure of Formula XVII and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XVIII: wherein the aforementioned definitions apply, and wherein exactly one substituent selected from the group consisting of R V , R T and R Z is CN.
- the organic molecules comprise or consist of a structure of Formula XVIII and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XIX: wherein the aforementioned definitions apply, and wherein exactly one substituent selected from the group consisting of R V and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XIX and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XX: wherein the aforementioned definitions apply, and wherein exactly one substituent selected from the group consisting of R V and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XX and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XXI: wherein the aforementioned definitions apply, and wherein exactly one substituent selected from the group consisting of R V and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XXI and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XXII: wherein the aforementioned definitions apply, and wherein exactly one substituent selected from the group consisting of R V and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XXII and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XXIII: wherein the aforementioned definitions apply, and wherein exactly one substituent selected from the group consisting of R V , R T and R Z is CN.
- the organic molecules comprise or consist of a structure of Formula XXIII and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XXIV: wherein the aforementioned definitions apply, and wherein exactly one substituent selected from the group consisting of R V , R T and R Z is CN.
- the organic molecules comprise or consist of a structure of Formula XXIV and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XXV: wherein the aforementioned definitions apply, and wherein exactly one substituent selected from the group consisting of R V , R T and R Z is CN.
- the organic molecules comprise or consist of a structure of Formula XXV and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XXVI: wherein the aforementioned definitions apply, and wherein exactly one substituent selected from the group consisting of R V , R T and R Z is CN.
- the organic molecules comprise or consist of a structure of Formula XXVI and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XXVII: wherein the aforementioned definitions apply, and wherein exactly one substituent selected from the group consisting of R V and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XXVII and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XXVIII: wherein the aforementioned definitions apply, and wherein exactly one substituent selected from the group consisting of R V and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XXVIII and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XXIX: wherein the aforementioned definitions apply, and wherein exactly one substituent selected from the group consisting of R V and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XXIX and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XXX: wherein the aforementioned definitions apply, and wherein exactly one substituent selected from the group consisting of R V and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XXX and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XXXI: wherein the aforementioned definitions apply, and wherein exactly one substituent selected from the group consisting of R V and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XXXI and R V is CN.
- the organic molecules comprise or consist of a structure of Formula XXXII: wherein the aforementioned definitions apply, and wherein exactly one substituent selected from the group consisting of R V and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XXXII and R V is CN.
- the organic molecules comprise or consist of a structure of Formula XXXIII: wherein the aforementioned definitions apply, and wherein exactly one substituent selected from the group consisting of R V and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XXXIII and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XXXIV: wherein the aforementioned definitions apply, and wherein exactly one substituent selected from the group consisting of R V and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XXXIV and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XXXV: wherein the aforementioned definitions apply, and wherein exactly one substituent selected from the group consisting of R V and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XXXV and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XXXVI: wherein the aforementioned definitions apply, and wherein exactly one substituent selected from the group consisting of R V and R T is CN.
- the organic molecules comprise or consist of a structure of Formula XXXVI and R T is CN.
- aryl and aromatic may be understood in the broadest sense as any mono-, bi- or polycyclic aromatic moieties. Accordingly, an aryl group contains 6 to 60 aromatic ring atoms, and a heteroaryl group contains 5 to 60 aromatic ring atoms, of which at least one is a heteroatom. Notwithstanding, throughout the application the number of aromatic ring atoms may be given as subscripted number in the definition of certain substituents. In particular, the heteroaromatic ring includes one to three heteroatoms.
- heteroaryl and “heteroaromatic” may be understood in the broadest sense as any mono-, bi- or polycyclic hetero-aromatic moieties that include at least one heteroatom.
- the heteroatoms may at each occurrence be the same or different and be individually selected from the group consisting of N, O and S.
- arylene refers to a divalent substituent that bears two binding sites to other molecular structures and thereby serving as a linker structure.
- a group in the exemplary embodiments is defined differently from the definitions given here, for example, the number of aromatic ring atoms or number of heteroatoms differs from the given definition, the definition in the exemplary embodiments is to be applied.
- a condensed (annulated) aromatic or heteroaromatic polycycle is built of two or more single aromatic or heteroaromatic cycles, which formed the polycycle via a condensation reaction.
- aryl group or heteroaryl group comprises groups which can be bound via any position of the aromatic or heteroaromatic group, derived from benzene, naphthaline, anthracene, phenanthrene, pyrene, dihydropyrene, chrysene, perylene, fluoranthene, benzanthracene, benzphenanthrene, tetracene, pentacene, benzpyrene, furan, benzofuran, isobenzofuran, dibenzofuran, thiophene, benzothiophene, isobenzothiophene, dibenzothiophene; pyrrole, indole, isoindole, carbazole, pyridine, quinoline, isoquinoline, acridine, phenanthridine, benzo-5,6-quinoline, benzo-6,7-quinoline, benzo-7,8-quinoline, phen
- cyclic group may be understood in the broadest sense as any mono-, bi- or polycyclic moieties.
- biphenyl as a substituent may be understood in the broadest sense as ortho-biphenyl, meta-biphenyl, or para-biphenyl, wherein ortho, meta and para is defined in regard to the binding site to another chemical moiety.
- alkyl group may be understood in the broadest sense as any linear, branched, or cyclic alkyl substituent.
- the term alkyl comprises the substituents methyl (Me), ethyl (Et), n-propyl ( n Pr), i-propyl ( i Pr), cyclopropyl, n-butyl ( n Bu), i-butyl ( i Bu), s-butyl ( s Bu), t-butyl( t Bu), cyclobutyl, 2-methylbutyl, n-pentyl, s-pentyl, t-pentyl, 2-pentyl, neo-pentyl, cyclopentyl, n-hexyl, s-hexyl, t-hexyl, 2-hexyl, 3-hexyl, neo-hexyl, cyclohexyl, 1-methyl (Me), ethy
- alkenyl comprises linear, branched, and cyclic alkenyl substituents.
- alkenyl group exemplarily comprises the substituents ethenyl, propenyl, butenyl, pentenyl, cyclopentenyl, hexenyl, cyclohexenyl, heptenyl, cycloheptenyl, octenyl, cyclooctenyl or cyclooctadienyl.
- alkynyl comprises linear, branched, and cyclic alkynyl substituents.
- alkynyl group exemplarily comprises ethynyl, propynyl, butynyl, pentynyl, hexynyl, heptynyl or octynyl.
- alkoxy comprises linear, branched, and cyclic alkoxy substituents.
- alkoxy group exemplarily comprises methoxy, ethoxy, n-propoxy, i-propoxy, n-butoxy, i-butoxy, s-butoxy, t-butoxy and 2-methylbutoxy.
- thioalkoxy comprises linear, branched, and cyclic thioalkoxy substituents, in which the O of the exemplarily alkoxy groups is replaced by S.
- halogen and “halo” may be understood in the broadest sense as being preferably fluorine, chlorine, bromine or iodine.
- the organic molecules according to the invention have an excited state lifetime of not more than 150 ⁇ s, of not more than 100 ⁇ s, in particular of not more than 50 ⁇ s, more preferably of not more than 10 ⁇ s or not more than 7 ⁇ s in a film of poly(methyl methacrylate) (PMMA) with 10 % by weight of organic molecule at room temperature.
- PMMA poly(methyl methacrylate)
- the organic molecules according to the invention represent thermally-activated delayed fluorescence (TADF) emitters, which exhibit a ⁇ E ST value, which corresponds to the energy difference between the first excited singlet state (S1) and the first excited triplet state (T1), of less than 5000 cm -1 , preferably less than 3000 cm -1 , more preferably less than 1500 cm -1 , even more preferably less than 1000 cm -1 or even less than 500 cm -1 .
- TADF thermally-activated delayed fluorescence
- the organic molecules according to the invention have an emission peak in the visible or nearest ultraviolet range, i.e., in the range of a wavelength of from 380 to 800 nm, with a full width at half maximum of less than 0.50 eV, preferably less than 0.48 eV, more preferably less than 0.45 eV, even more preferably less than 0.43 eV or even less than 0.40 eV in a film of poly(methyl methacrylate) (PMMA) with 10 % by weight of organic molecule at room temperature.
- PMMA poly(methyl methacrylate)
- the organic molecules according to the invention have a "blue material index" (BMI), calculated by dividing the photoluminescence quantum yield (PLQY) in % by the CIEy color coordinate of the emitted light, of more than 150, in particular more than 200, preferably more than 250, more preferably of more than 300 or even more than 500.
- BMI blue material index
- Orbital and excited state energies can be determined either by means of experimental methods or by calculations employing quantum-chemical methods, in particular density functional theory calculations.
- the energy of the highest occupied molecular orbital E HOMO is determined by methods known to the person skilled in the art from cyclic voltammetry measurements with an accuracy of 0.1 eV.
- the energy of the lowest unoccupied molecular orbital E LUMO is calculated as E HOMO + E gap , wherein E gap is determined as follows: For host compounds, the onset of the emission spectrum of a film with 10 % by weight of host in poly(methyl methacrylate) (PMMA) is used as E gap , unless stated otherwise. For emitter molecules, E gap is determined as the energy at which the excitation and emission spectra of a film with 10 % by weight of emitter in PMMA cross.
- the energy of the first excited triplet state T1 is determined from the onset of the emission spectrum at low temperature, typically at 77 K.
- the energy of the first excited triplet state T1 is determined from the onset of the delayed emission spectrum at 77 K, if not otherwise stated measured in a film of PMMA with 10 % by weight of emitter.
- the energy of the first excited singlet state S1 is determined from the onset of the emission spectrum, if not otherwise stated measured in a film of PMMA with 10 % by weight of host or emitter compound.
- the onset of an emission spectrum is determined by computing the intersection of the tangent to the emission spectrum with the x-axis.
- the tangent to the emission spectrum is set at the high-energy side of the emission band and at the point at half maximum of the maximum intensity of the emission spectrum.
- a further aspect of the invention relates to a process for preparing organic molecules (with an optional subsequent reaction) according to the invention, wherein a halo-fluoropyridine, which is substituted with either one R 1 and two R 2 or two R 1 and one R 2 , is used as a reactant:
- a boronic acid or an equivalent boronic acid ester can be used instead of a boronic pinacol ester.
- boronic acid esters or boronic acids are 4-cyano-2-fluorophenylboronic ester or acid, 5-cyano-2-fluorophenylboronic ester or acid, 3-cyano-2-fluorophenylboronic ester or acid, 6-cyano-2-fluorophenylboronic ester or acid, 2-cyano-3-fluorophenylboronic ester or acid, 4-cyano-3-fluorophenylboronic ester or acid, 5-cyano-3-fluorophenylboronic ester or acid, 6-cyano-3-fluorophenylboronic ester or acid, 2-cyano-4-fluorophenylboronic ester or acid and 3-cyano-4-fluorophenylboronic ester or acid.
- the halo-fluoro-pyridine is selected from chloro-fluoropyridine and bromo-fluoropyridine.
- Exemplary halo-fluoro-pyridines are 4-chloro-3-fluoro-pyridine, 4-chloro-2-fluoro-pyridine, 3-chloro-4-fluoro-pyridine, 3-chloro-5-fluoro-pyridine, 3-chloro-6-fluoro-pyridine, 3-chloro-2-fluoro-pyridine, 2-chloro-3-fluoro-pyridine, 2-chloro-4-fluoro-pyridine, 2-chloro-5-fluoro-pyridine, 2-chloro-6-fluoro-pyridine, 3-bromo-4-fluoro-pyridine, 3-bromo-5-fluoro-pyridine, 3-bromo-6-fluoro-pyridine, 3-bromo-2-fluoro-pyridine, 2-bromo-3-fluoro-pyridine, 2-bromo-4-fluoro-
- typical conditions include the use of a base, such as tribasic potassium phosphate or sodium hydride, for example, in an aprotic polar solvent, such as dimethyl sulfoxide (DMSO) or N,N-dimethylformamide (DMF), for example.
- a base such as tribasic potassium phosphate or sodium hydride
- an aprotic polar solvent such as dimethyl sulfoxide (DMSO) or N,N-dimethylformamide (DMF), for example.
- An alternative synthesis route comprises the introduction of a nitrogen heterocycle via copper- or palladium-catalyzed coupling to an aryl halide or aryl pseudohalide, preferably an aryl bromide, an aryl iodide, aryl triflate or an aryl tosylate.
- a further aspect of the invention relates to the use of an organic molecule according to the invention as a luminescent emitter or as an absorber, and/or as host material and/or as electron transport material, and/or as hole injection material, and/or as hole blocking material in an optoelectronic device.
- the optoelectronic device may be understood in the broadest sense as any device based on organic materials that is suitable for emitting light in the visible or nearest ultraviolet (UV) range, i.e., in the range of a wavelength of from 380 to 800 nm. More preferably, the optoelectronic device may be able to emit light in the visible range, i.e., of from 400 to 800 nm.
- UV visible or nearest ultraviolet
- the optoelectronic device is more particularly selected from the group consisting of:
- the optoelectronic device is a device selected from the group consisting of an organic light emitting diode (OLED), a light emitting electrochemical cell (LEC), and a light-emitting transistor.
- OLED organic light emitting diode
- LEC light emitting electrochemical cell
- the fraction of the organic molecule according to the invention in the emission layer in an optoelectronic device, more particularly in OLEDs is 1 % to 99 % by weight, more particularly 5 % to 80 % by weight. In an alternative embodiment, the proportion of the organic molecule in the emission layer is 100 % by weight.
- the light-emitting layer comprises not only the organic molecules according to the invention but also a host material whose triplet (T1) and singlet (S1) energy levels are energetically higher than the triplet (T1) and singlet (S1) energy levels of the organic molecule.
- a further aspect of the invention relates to a composition
- a composition comprising or consisting of:
- the light-emitting layer comprises (or (essentially) consists of) a composition comprising or consisting of:
- the light-emitting layer EML comprises (or (essentially) consists of) a composition comprising or consisting of:
- energy can be transferred from the host compound H to the one or more organic molecules according to the invention E, in particular transferred from the first excited triplet state T1(H) of the host compound H to the first excited triplet state T1(E) of the one or more organic molecules according to the invention E and/ or from the first excited singlet state S1(H) of the host compound H to the first excited singlet state S1(E) of the one or more organic molecules according to the invention E.
- the light-emitting layer EML comprises (or (essentially) consists of) a composition comprising or consisting of:
- the host compound H has a highest occupied molecular orbital HOMO(H) having an energy E HOMO (H) in the range of from -5 to -6.5 eV and the at least one further host compound D has a highest occupied molecular orbital HOMO(D) having an energy E HOMO (D), wherein E HOMO (H) > E HOMO (D).
- the host compound H has a lowest unoccupied molecular orbital LUMO(H) having an energy E LUMO (H) and the at least one further host compound D has a lowest unoccupied molecular orbital LUMO(D) having an energy E LUMO (D), wherein E LUMO (H) > E LUMO (D).
- the host compound H has a highest occupied molecular orbital HOMO(H) having an energy E HOMO (H) and a lowest unoccupied molecular orbital LUMO(H) having an energy E LUMO (H)
- the at least one further host compound D has a highest occupied molecular orbital HOMO(D) having an energy E HOMO (D) and a lowest unoccupied molecular orbital LUMO(D) having an energy E LUMO (D)
- the organic molecule according to the invention E has a highest occupied molecular orbital HOMO(E) having an energy E HOMO (E) and a lowest unoccupied molecular orbital LUMO(E) having an energy E LUMO (E)
- the invention relates to an optoelectronic device comprising an organic molecule or a composition of the type described here, more particularly in the form of a device selected from the group consisting of organic light-emitting diode (OLED), light-emitting electrochemical cell, OLED sensor, more particularly gas and vapour sensors not hermetically externally shielded, organic diode, organic solar cell, organic transistor, organic field-effect transistor, organic laser and down-conversion element.
- OLED organic light-emitting diode
- OLED sensor more particularly gas and vapour sensors not hermetically externally shielded
- organic diode organic solar cell
- organic transistor organic field-effect transistor
- organic laser and down-conversion element organic laser and down-conversion element
- the optoelectronic device is a device selected from the group consisting of an organic light emitting diode (OLED), a light emitting electrochemical cell (LEC), and a light-emitting transistor.
- OLED organic light emitting diode
- LEC light emitting electrochemical cell
- the organic molecule according to the invention E is used as emission material in a light-emitting layer EML.
- the light-emitting layer EML consists of the composition according to the invention described here.
- the optoelectronic device when the optoelectronic device is an OLED, it may exhibit the following layer structure:
- the optoelectronic device may optionally comprise one or more protective layers protecting the device from damaging exposure to harmful species in the environment including, exemplarily moisture, vapor and/or gases.
- the optoelectronic device is an OLED, which exhibits the following inverted layer structure:
- the OLED with an inverted layer structure comprises each layer only optionally, different layers may be merged and the OLED may comprise more than one layer of each layer types defined above.
- the optoelectronic device is an OLED, which may exhibit stacked architecture.
- this architecture contrary to the typical arrangement, where the OLEDs are placed side by side, the individual units are stacked on top of each other.
- Blended light may be generated with OLEDs exhibiting a stacked architecture, in particular white light may be generated by stacking blue, green and red OLEDs.
- the OLED exhibiting a stacked architecture may optionally comprise a charge generation layer (CGL), which is typically located between two OLED subunits and typically consists of a n-doped and p-doped layer with the n-doped layer of one CGL being typically located closer to the anode layer.
- CGL charge generation layer
- the optoelectronic device is an OLED, which comprises two or more emission layers between anode and cathode.
- this so-called tandem OLED comprises three emission layers, wherein one emission layer emits red light, one emission layer emits green light and one emission layer emits blue light, and optionally may comprise further layers such as charge generation layers, blocking or transporting layers between the individual emission layers.
- the emission layers are adjacently stacked.
- the tandem OLED comprises a charge generation layer between each two emission layers.
- adjacent emission layers or emission layers separated by a charge generation layer may be merged.
- the substrate may be formed by any material or composition of materials. Most frequently, glass slides are used as substrates. Alternatively, thin metal layers (e.g., copper, gold, silver or aluminum films) or plastic films or slides may be used. This may allow a higher degree of flexibility.
- the anode layer A is mostly composed of materials allowing to obtain an (essentially) transparent film. As at least one of both electrodes should be (essentially) transparent in order to allow light emission from the OLED, either the anode layer A or the cathode layer C is transparent.
- the anode layer A comprises a large content or even consists of transparent conductive oxides (TCOs).
- Such anode layer A may exemplarily comprise indium tin oxide, aluminum zinc oxide, fluorine doped tin oxide, indium zinc oxide, PbO, SnO, zirconium oxide, molybdenum oxide, vanadium oxide, wolfram oxide, graphite, doped Si, doped Ge, doped GaAs, doped polyaniline, doped polypyrrol and/or doped polythiophene.
- the anode layer A (essentially) consists of indium tin oxide (ITO) (e.g., (InO 3 )0.9(SnO 2 )0.1).
- the roughness of the anode layer A caused by the transparent conductive oxides (TCOs) may be compensated by using a hole injection layer (HIL). Further, the HIL may facilitate the injection of quasi charge carriers (i.e., holes) in that the transport of the quasi charge carriers from the TCO to the hole transport layer (HTL) is facilitated.
- the hole injection layer (HIL) may comprise poly-3,4-ethylendioxy thiophene (PEDOT), polystyrene sulfonate (PSS), MoO 2 , V 2 O 5 , CuPC or Cul, in particular a mixture of PEDOT and PSS.
- the hole injection layer may also prevent the diffusion of metals from the anode layer A into the hole transport layer (HTL).
- the HIL may exemplarily comprise PEDOT:PSS (poly-3,4-ethylendioxy thiophene: polystyrene sulfonate), PEDOT (poly-3,4-ethylendioxy thiophene), mMTDATA (4,4',4"-tris[phenyl(m-tolyl)amino]triphenylamine), Spiro-TAD (2,2',7,7'-tetrakis(n,n-diphenylamino)-9,9'-spirobifluorene), DNTPD (N1,N1'-(biphenyl-4,4'-diyl)bis(N1-phenyl-N4,N4-di-m-tolylbenzene-1,4-diamine), NPB (N,N'-nis-(1-na
- HTL hole transport layer
- any hole transport compound may be used.
- electron-rich heteroaromatic compounds such as triarylamines and/or carbazoles may be used as hole transport compound.
- the HTL may decrease the energy barrier between the anode layer A and the light-emitting layer EML.
- the hole transport layer (HTL) may also be an electron blocking layer (EBL).
- EBL electron blocking layer
- hole transport compounds bear comparably high energy levels of their triplet states T1.
- the hole transport layer may comprise a star-shaped heterocycle such as tris(4-carbazoyl-9-ylphenyl)amine (TCTA), poly-TPD (poly(4-butylphenyl-diphenyl-amine)), [alpha]-NPD (poly(4-butylphenyl-diphenyl-amine)), TAPC (4,4'-cyclohexyliden-bis[N,N-bis(4-methylphenyl)benzenamine]), 2-TNATA (4,4',4"-tris[2-naphthyl(phenyl)amino]triphenylamine), Spiro-TAD, DNTPD, NPB, NPNPB, MeO-TPD, HAT-CN and/or TrisPcz (9,9'-diphenyl-6-(9-phenyl-9H-carbazol-3-yl)-9H,9'H-3,3'-bicarbazole).
- TCTA tris(4-car
- the HTL may comprise a p-doped layer, which may be composed of an inorganic or organic dopant in an organic hole-transporting matrix.
- Transition metal oxides such as vanadium oxide, molybdenum oxide or tungsten oxide may exemplarily be used as inorganic dopant.
- Tetrafluorotetracyanoquinodimethane (F 4 -TCNQ), copper-pentafluorobenzoate (Cu(I)pFBz) or transition metal complexes may exemplarily be used as organic dopant.
- the EBL may exemplarily comprise mCP (1,3-bis(carbazol-9-yl)benzene), TCTA, 2-TNATA, mCBP (3,3-di(9H-carbazol-9-yl)biphenyl), tris-Pcz, CzSi (9-(4-tert-Butylphenyl)-3,6-bis(triphenylsilyl)-9H-carbazole), and/or DCB (N,N'-dicarbazolyl-1,4-dimethylbenzene).
- the light-emitting layer EML Adjacent to the hole transport layer (HTL), typically, the light-emitting layer EML is located.
- the light-emitting layer EML comprises at least one light emitting molecule.
- the EML comprises at least one light emitting molecule according to the invention E.
- the light-emitting layer comprises only the organic molecules according to the invention E.
- the EML additionally comprises one or more host materials H.
- the host material H is selected from CBP (4,4'-Bis-(N-carbazolyl)-biphenyl), mCP, mCBP Sif87 (dibenzo[b,d]thiophen-2-yltriphenylsilane), CzSi, Sif88 (dibenzo[b,d]thiophen-2-yl)diphenylsilane), DPEPO (bis[2-(diphenylphosphino)phenyl] ether oxide), 9-[3-(dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3-(dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3-(dibenzothiophen-2-yl)phenyl]-9H-carbazole, 9-[3,5-bis(2-dibenzofuranyl)phenyl]-9H-carbazole, 9-[3,5-bis(2-
- the EML comprises a so-called mixed-host system with at least one hole-dominant host and one electron-dominant host.
- the EML comprises exactly one light emitting molecule according to the invention E and a mixed-host system comprising T2T as electron-dominant host and a host selected from CBP, mCP, mCBP, 9-[3-(dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3-(dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3-(dibenzothiophen-2-yl)phenyl]-9H-carbazole, 9-[3,5-bis(2-dibenzofuranyl)phenyl]-9H-carbazole and 9-[3,5-bis(2-dibenzothiophenyl)phenyl]-9H-carbazole as hole-dominant host.
- the EML comprises 50-80 % by weight, preferably 60-75 % by weight of a host selected from CBP, mCP, mCBP, 9-[3-(dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3-(dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3-(dibenzothiophen-2-yl)phenyl]-9H-carbazole, 9-[3,5-bis(2-dibenzofuranyl)phenyl]-9H-carbazole and 9-[3,5-bis(2-dibenzothiophenyl)phenyl]-9H-carbazole; 10-45 % by weight, preferably 15-30 % by weight of T2T and 5-40 % by weight, preferably 10-30 % by weight of light emitting molecule according to the invention.
- a host selected from CBP, mCP, mCBP
- an electron transport layer Adjacent to the light-emitting layer EML an electron transport layer (ETL) may be located.
- ETL electron transport layer
- any electron transporter may be used.
- electron-poor compounds such as, e.g., benzimidazoles, pyridines, triazoles, oxadiazoles (e.g., 1,3,4-oxadiazole), phosphinoxides and sulfone, may be used.
- An electron transporter may also be a star-shaped heterocycle such as 1,3,5-tri(1-phenyl-1H-benzo[d]imidazol-2-yl)phenyl (TPBi).
- the ETL may comprise NBphen (2,9-bis(naphthalen-2-yl)-4,7-diphenyl-1,10-phenanthroline), Alq 3 (Aluminum-tris(8-hydroxyquinoline)), TSPO1 (diphenyl-4-triphenylsilylphenyl-phosphinoxide), BPyTP2 (2,7-di(2,2'-bipyridin-5-yl)triphenyle), Sif87 (dibenzo[b,d]thiophen-2-yltriphenylsilane), Sif88 (dibenzo[b,d]thiophen-2-yl)diphenylsilane), BmPyPhB (1,3-bis[3,5-di(pyridin-3-yl)phenyl]benzene) and/or BTB (4,4'-bis-[2-(4,6-diphenyl-1,3,5-triazinyl)]-1,1'-biphenyl
- the ETL may be doped with materials such as Liq.
- the electron transport layer (ETL) may also block holes or a holeblocking layer (HBL) is introduced.
- a cathode layer C Adjacent to the electron transport layer (ETL), a cathode layer C may be located.
- the cathode layer C may comprise or may consist of a metal (e.g., Al, Au, Ag, Pt, Cu, Zn, Ni, Fe, Pb, LiF, Ca, Ba, Mg, In, W, or Pd) or a metal alloy.
- the cathode layer may also consist of (essentially) intransparent metals such as Mg, Ca or Al.
- the cathode layer C may also comprise graphite and or carbon nanotubes (CNTs).
- the cathode layer C may also consist of nanoscalic silver wires.
- An OLED may further, optionally, comprise a protection layer between the electron transport layer (ETL) and the cathode layer C (which may be designated as electron injection layer (EIL)).
- This layer may comprise lithium fluoride, cesium fluoride, silver, Liq (8-hydroxyquinolinolatolithium), Li 2 O, BaF 2 , MgO and/or NaF.
- the electron transport layer (ETL) and/or a hole blocking layer (HBL) may comprise one or more host compounds H.
- the light-emitting layer EML may further comprise one or more further emitter molecules F.
- an emitter molecule F may be any emitter molecule known in the art.
- an emitter molecule F is a molecule with a structure differing from the structure of the molecules according to the invention E.
- the emitter molecule F may optionally be a TADF emitter.
- the emitter molecule F may optionally be a fluorescent and/or phosphorescent emitter molecule which is able to shift the emission spectrum and/or the absorption spectrum of the light-emitting layer EML.
- the triplet and/or singlet excitons may be transferred from the emitter molecule according to the invention E to the emitter molecule F before relaxing to the ground state S0 by emitting light typically red-shifted in comparison to the light emitted by emitter molecule E.
- the emitter molecule F may also provoke two-photon effects (i.e., the absorption of two photons of half the energy of the absorption maximum).
- an optoelectronic device may exemplarily be an essentially white optoelectronic device.
- a white optoelectronic device may comprise at least one (deep) blue emitter molecule and one or more emitter molecules emitting green and/or red light. Then, there may also optionally be energy transmittance between two or more molecules as described above.
- the designation of the colors of emitted and/or absorbed light is as follows:
- a deep blue emitter has an emission maximum in the range of from >420 to 480 nm
- a sky blue emitter has an emission maximum in the range of from >480 to 500 nm
- a green emitter has an emission maximum in a range of from >500 to 560 nm
- a red emitter has an emission maximum in a range of from >620 to 800 nm.
- a deep blue emitter may preferably have an emission maximum of below 480 nm, more preferably below 470 nm, even more preferably below 465 nm or even below 460 nm. It will typically be above 420 nm, preferably above 430 nm, more preferably above 440 nm or even above 450 nm.
- a further aspect of the present invention relates to an OLED, which exhibits an external quantum efficiency at 1000 cd/m 2 of more than 8 %, more preferably of more than 10 %, more preferably of more than 13 %, even more preferably of more than 15 % or even more than 20 % and/or exhibits an emission maximum between 420 nm and 500 nm, preferably between 430 nm and 490 nm, more preferably between 440 nm and 480 nm, even more preferably between 450 nm and 470 nm and/or exhibits a LT80 value at 500 cd/m 2 of more than 100 h, preferably more than 200 h, more preferably more than 400 h, even more preferably more than 750 h or even more than 1000 h.
- a further aspect of the present invention relates to an OLED, whose emission exhibits a CIEy color coordinate of less than 0.45, preferably less than 0.30, more preferably less than 0.20 or even more preferably less than 0.15 or even less than 0.10.
- a further aspect of the present invention relates to an OLED, which emits light at a distinct color point.
- the OLED emits light with a narrow emission band (small full width at half maximum (FWHM)).
- FWHM full width at half maximum
- the OLED according to the invention emits light with a FWHM of the main emission peak of less than 0.50 eV, preferably less than 0.48 eV, more preferably less than 0.45 eV, even more preferably less than 0.43 eV or even less than 0.40 eV.
- UHD Ultra High Definition
- a further aspect of the present invention relates to an OLED, whose emission exhibits a CIEx color coordinate of between 0.02 and 0.30, preferably between 0.03 and 0.25, more preferably between 0.05 and 0.20 or even more preferably between 0.08 and 0.18 or even between 0.10 and 0.15 and/ or a a CIEy color coordinate of between 0.00 and 0.45, preferably between 0.01 and 0.30, more preferably between 0.02 and 0.20 or even more preferably between 0.03 and 0.15 or even between 0.04 and 0.10.
- the invention relates to a method for producing an optoelectronic component.
- an organic molecule of the invention is used.
- the optoelectronic device in particular the OLED according to the present invention can be fabricated by any means of vapor deposition and/ or liquid processing. Accordingly, at least one layer is
- the methods used to fabricate the optoelectronic device, in particular the OLED according to the present invention are known in the art.
- the different layers are individually and successively deposited on a suitable substrate by means of subsequent deposition processes.
- the individual layers may be deposited using the same or differing deposition methods.
- Vapor deposition processes exemplarily comprise thermal (co)evaporation, chemical vapor deposition and physical vapor deposition.
- an AMOLED backplane is used as substrate.
- the individual layer may be processed from solutions or dispersions employing adequate solvents.
- Solution deposition process exemplarily comprise spin coating, dip coating and jet printing.
- Liquid processing may optionally be carried out in an inert atmosphere (e.g., in a nitrogen atmosphere) and the solvent may optionally be completely or partially removed by means known in the state of the art.
- reaction mixture is poured into 200 mL of a saturated sodium chloride solution and extracted with ethyl acetate.
- the combined organic phases are washed with saturated sodium chloride solution, dried over MgSO 4 and the solvent is evaporated under reduced pressure.
- the residue is purified by chromatography (28 % yield) or alternatively is stirred in hot ethanol and filtered. After concentrating the solution under reduced pressure, Z2 is washed with ethyl acetate and obtained as solid.
- Z2 The synthesis of Z2 is carried out according to AAV1, wherein 4-chloro-3-fluoropyridine E3 reacts with 4-cyano-2-fluorophenylboronic acid (45% yield).
- Z4 The synthesis of Z4 is carried out according to AAV1, wherein 3-bromo-4-fluoropyridine E4 reacts with 5-cyano-2-fluorophenylboronic ester.
- the donor molecule D-H is a 3,6-substituted carbazole (e.g., 3,6-dimethylcarbazole, 3,6-diphenylcarbazole, 3,6-di-tert-butylcarbazole), a 2,7-substituted carbazole (e.g., 2,7-dimethylcarbazole, 2,7-diphenylcarbazole, 2,7-di-tert-butylcarbazole), a 1,8-substituted carbazole (e.g., 1,8-dimethylcarbazole, 1,8-diphenylcarbazole, 1,8-di-tert-butylcarbazole), a 1-substituted carbazole (e.g., 1-methylcarbazole, 1-phenylcarbazole, 1-tert-butylcarbazole), a 2-substituted carbazole (e.g., 2-methylcarbazol,
- a halogen-substituted carbazole particularly 3-bromocarbazole
- D-H a boronic acid ester functional group or boronic acid functional group
- a boronic acid ester functional group or boronic acid functional group may be exemplarily introduced at the position of the one or more halogen substituents, which was introduced via D-H, to yield the corresponding carbazol-3-ylboronic acid ester or carbazol-3-ylboronic acid, e.g., via the reaction with bis(pinacolato)diboron ( CAS No. 73183-34-3 ).
- one or more substituents R a may be introduced in place of the boronic acid ester group or the boronic acid group via a coupling reaction with the corresponding halogenated reactant R a -Hal, preferably R a -Cl and R a -Br.
- one or more substituents R a may be introduced at the position of the one or more halogen substituents, which was introduced via D-H, via the reaction with a boronic acid of the substituent R a [R a -B(OH) 2 ] or a corresponding boronic acid ester.
- Cyclic voltammograms are measured from solutions having concentration of 10 -3 mol/L of the organic molecules in dichloromethane or a suitable solvent and a suitable supporting electrolyte (e.g. 0.1 mol/L of tetrabutylammonium hexafluorophosphate).
- the measurements are conducted at room temperature under nitrogen atmosphere with a three-electrode assembly (Working and counter electrodes: Pt wire, reference electrode: Pt wire) and calibrated using FeCp 2 /FeCp 2 + as internal standard.
- the HOMO data was corrected using ferrocene as internal standard against a saturated calomel electrode (SCE).
- BP86 BP86 functional and the resolution of identity approach (RI).
- Excitation energies are calculated using the (BP86) optimized structures employing Time-Dependent DFT (TD-DFT) methods.
- Orbital and excited state energies are calculated with the B3LYP functional.
- Def2-SVP basis sets and a m4-grid for numerical integration are used.
- the Turbomole program package is used for all calculations.
- the sample concentration is 10 mg/ml, dissolved in a suitable solvent.
- Photoluminescence spectroscopy and TCSPC Time-correlated single-photon counting
- Steady-state emission spectroscopy is measured by a Horiba Scientific, Modell FluoroMax-4 equipped with a 150 W Xenon-Arc lamp, excitation- and emissions monochromators and a Hamamatsu R928 photomultiplier and a time-correlated single-photon counting option. Emissions and excitation spectra are corrected using standard correction fits.
- Excited state lifetimes are determined employing the same system using the TCSPC method with FM-2013 equipment and a Horiba Yvon TCSPC hub.
- Data analysis is done using the software suite DataStation and DAS6 analysis software. The fit is specified using the chi-squared-test.
- Emission maxima are given in nm, quantum yields ⁇ in % and CIE coordinates as x,y values.
- PLQY is determined using the following protocol:
- OLED devices comprising organic molecules according to the invention can be produced via vacuum-deposition methods. If a layer contains more than one compound, the weight-percentage of one or more compounds is given in %. The total weight-percentage values amount to 100 %, thus if a value is not given, the fraction of this compound equals to the difference between the given values and 100 %.
- the not fully optimized OLEDs are characterized using standard methods and measuring electroluminescence spectra, the external quantum efficiency (in %) in dependency on the intensity, calculated using the light detected by the photodiode, and the current. The OLED device lifetime is extracted from the change of the luminance during operation at constant current density.
- the LT50 value corresponds to the time, where the measured luminance decreased to 50 % of the initial luminance
- LT80 corresponds to the time point, at which the measured luminance decreased to 80 % of the initial luminance, LT 95 to the time point, at which the measured luminance decreased to 95 % of the initial luminance etc.
- Accelerated lifetime measurements are performed (e.g. applying increased current densities).
- the values correspond to the average of several pixels (typically two to eight), the standard deviation between these pixels is given.
- Example 1 was synthesized according to AAV1 and AAV5 (26 % yield).
- Figure 1 depicts the emission spectrum of example 1 (10 % by weight in PMMA).
- the emission maximum ( ⁇ max ) is at 464 nm.
- the photoluminescence quantum yield (PLQY) is 64 %, the full width at half maximum (FWHM) is 0.41 eV and the emission lifetime is 150 ⁇ s.
- the resulting CIE x coordinate is determined at 0.17 and the CIE y coordinate at 0.20.
- Example 2 was synthesized according to AAV2 and AAV5 (33 % yield).
- Figure 2 depicts the emission spectrum of example 2 (10 % by weight in PMMA).
- the emission maximum ( ⁇ max ) is at 496 nm.
- the photoluminescence quantum yield (PLQY) is 76 %, the full width at half maximum (FWHM) is 0.43 eV and the emission lifetime is 121 ⁇ s.
- the resulting CIE x coordinate is determined at 0.22 and the CIE y coordinate at 0.42.
- Example 3 was synthesized according to AAV2 and AAV5 (38 % yield).
- Figure 3 depicts the emission spectrum of example 3 (10 % by weight in PMMA).
- the emission maximum ( ⁇ max ) is at 480 nm.
- the photoluminescence quantum yield (PLQY) is 76 %, the full width at half maximum (FWHM) is 0.43 eV and the emission lifetime is 130 ⁇ s.
- the resulting CIE x coordinate is determined at 0.18 and the CIE y coordinate at 0.32.
- Example 4 was synthesized according to AAV2 and AAV5 (28 % yield).
- Figure 4 depicts the emission spectrum of example 4 (10 % by weight in PMMA).
- the emission maximum is at 489 nm.
- the photoluminescence quantum yield (PLQY) is 79 %, the full width at half maximum is 0.43 eV and the emission lifetime is 26 ⁇ s.
- the resulting CIE x coordinate is determined at 0.20 and the CIE y coordinate at 0.39.
- Example 5 was synthesized according to AAV3 and AAV5 (15 % yield).
- Figure 5 depicts the emission spectrum of example 5 (10 % by weight in PMMA).
- the emission maximum is at 472 nm.
- the photoluminescence quantum yield (PLQY) is 66 %, the full width at half maximum is 0.44 eV and the emission lifetime is 650 ⁇ s.
- the resulting CIE x coordinate is determined at 0.17 and the CIE y coordinate at 0.24.
- Example 6 was synthesized according to AAV1 and AAV5 (46 % yield).
- Figure 6 depicts the emission spectrum of example 6 (10 % by weight in PMMA).
- the emission maximum is at 434 nm.
- the photoluminescence quantum yield (PLQY) is 50 %, the full width at half maximum is 0.40 eV and the emission lifetime is 437 ⁇ s.
- the resulting CIE x coordinate is determined at 0.17 and the CIE y coordinate at 0.11.
- Example 7 was synthesized according to AAV2 and AAV5 (85 % yield).
- Figure 7 depicts the emission spectrum of example 7 (10 % by weight in PMMA).
- the emission maximum is at 464 nm.
- the photoluminescence quantum yield (PLQY) is 79 %, the full width at half maximum is 0.39 eV and the emission lifetime is 8 ⁇ s.
- the resulting CIE x coordinate is determined at 0.16 and the CIEy coordinate at 0.20.
- the energy of the highest occupied molecular orbital E HOMO is determined at -5.78 eV.
- Example 7 was tested in the OLED D1, which was fabricated with the following layer structure:
- Device D1 yielded an external quantum efficiency (EQE) at 1000 cd/m 2 of 8.0 %.
- the emission maximum is at 468 nm with a FWHM of 59 nm at 6.0 V.
- the corresponding CIEx value is 0.14 and CIEy is 0.17.
- Example 1 was tested in the OLED D2, which was fabricated with the following layer structure:
- Device D2 yielded an external quantum efficiency (EQE) at 1000 cd/m 2 of 8.6%.
- the emission maximum is at 475 nm with a FWHM of 64 nm at 8.0 V.
- the corresponding CIEx value is 0.17 and CIEy is 0.26.
- Example 3 was tested in the OLED D3, which was fabricated with the following layer structure:
- Device D3 yielded an external quantum efficiency (EQE) at 1000 cd/m 2 of 14.5%.
- the emission maximum is at 478 nm with a FWHM of 69 nm at 10.0 V.
- the corresponding CIEy value is 0.32.
- Example 3 was tested in the OLED D4, which was fabricated with the following layer structure:
- Device D4 yielded an external quantum efficiency (EQE) at 1000 cd/m 2 of 18.9 %.
- the emission maximum is at 486 nm with a FWHM of 70 nm at 7.0 V.
- the corresponding CIEy value is 0.37.
- Example 7 was tested in the OLED D5, which was fabricated with the following layer structure:
- Device D5 yielded an external quantum efficiency (EQE) at 1000 cd/m 2 of 8.1 %.
- the emission maximum is at 462 nm with a FWHM of 59 nm at 10 V.
- the corresponding CIEx value is 0.15 and CIEy is 0.17.
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Description
- The invention relates to organic molecules and their use in organic light-emitting diodes (OLEDs) and in other optoelectronic devices.
- The object of the present invention is to provide molecules which are suitable for use in optoelectronic devices.
EP3113239A1 describes organic compounds useful in OLEDs. - This object is achieved by the invention which provides a new class of organic molecules.
- According to the invention the organic molecules are purely organic molecules, i.e. they do not contain any metal ions in contrast to metal complexes known for use in optoelectronic devices. According to the present invention, the organic molecules exhibit emission maxima in the blue, sky-blue or green spectral range. The organic molecules exhibit in particular emission maxima between 420 nm and 520 nm, preferably between 440 nm and 495 nm, more preferably between 450 nm and 470 nm. The photoluminescence quantum yields of the organic molecules according to the invention are, in particular, 20 % or more. The molecules according to the invention exhibit in particular thermally activated delayed fluorescence (TADF). The use of the molecules according to the invention in an optoelectronic device, for example an organic light-emitting diode (OLED), leads to higher efficiencies of the device. Corresponding OLEDs have a higher stability than OLEDs with known emitter materials and comparable color.
-
- - two second chemical moieties, each independently from another comprising or consisting of a structure of Formula II,
- LT is N or C-R1.
- LV is N or C-R1.
- LW is N or C-W.
- X is the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties or is R2.
- Y is the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties or is R2.
- W is the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties or is R2.
- RT is selected from the group consisting of CN and RI.
- RV is selected from the group consisting of CN and RI.
- RW is the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties or is selected from the group consisting of CN and RI.
- RX is the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties or is RI.
- RY is the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties or is RI.
- # represents the binding site of a single bond linking the second chemical moieties to the first chemical moiety;
- Z is at each occurrence independently from another selected from the group consisting of a direct bond, CR3R4, C=CR3R4, C=O, C=NR3, NR3, O, SiR3R4, S, S(O) and S(O)2;
- R1 is at each occurrence independently from another selected from the group consisting of hydrogen,
deuterium,
C1-C5-alkyl,
wherein one or more hydrogen atoms are optionally substituted by deuterium;
C2-C8-alkenyl,
wherein one or more hydrogen atoms are optionally substituted by deuterium;
C2-C8-alkynyl,
wherein one or more hydrogen atoms are optionally substituted by deuterium; and
C6-C18-aryl,
which is optionally substituted with one or more substituents R6.
- R2 is at each occurrence independently from another selected from the group consisting of hydrogen,
- deuterium,
- C1-C5-alkyl, wherein one or more hydrogen atoms are optionally substituted by deuterium;
- C2-C8-alkenyl, wherein one or more hydrogen atoms are optionally substituted by deuterium;
- C2-C8-alkynyl, wherein one or more hydrogen atoms are optionally substituted by deuterium; and
- C6-C18-aryl, which is optionally substituted with one or more substituents R6.
- RI is at each occurrence independently from another selected from the group consisting of hydrogen,
- deuterium,
- C1-C5-alkyl,
wherein one or more hydrogen atoms are optionally substituted by deuterium; - C2-C8-alkenyl,
wherein one or more hydrogen atoms are optionally substituted by deuterium; - C2-C8-alkynyl,
wherein one or more hydrogen atoms are optionally substituted by deuterium; and - C6-C18-aryl,
which is optionally substituted with one or more substituents R6.
- Ra, R3 and R4 is at each occurrence independently from another selected from the group consisting of hydrogen, deuterium, N(R5)2, OR5, Si(R5)3, B(OR5)2, OSO2R5, CF3, CN, F, Br, I,
- C1-C40-alkyl,
which is optionally substituted with one or more substituents R5 and
wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
C1-C40-alkoxy,
which is optionally substituted with one or more substituents R5 and wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
C1-C40-thioalkoxy,
which is optionally substituted with one or more substituents R5 and wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
C2-C40-alkenyl,
which is optionally substituted with one or more substituents R5 and wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
C2-C40-alkynyl,
which is optionally substituted with one or more substituents R5 and wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
C6-C60-aryl,
which is optionally substituted with one or more substituents R5; and
C3-C57-heteroaryl,
which is optionally substituted with one or more substituents R5. - R5 is at each occurrence independently from another selected from the group consisting of hydrogen, deuterium, N(R6)2, OR6, Si(R6)3, B(OR6)2, OSO2R6, CF3, CN, F, Br, I,
C1-C40-alkyl,
which is optionally substituted with one or more substituents R6 and wherein one or more non-adjacent CH2-groups are optionally substituted by R6C=CR6, C≡C, Si(R6)2, Ge(R6)2, Sn(R6)2, C=O, C=S, C=Se, C=NR6, P(=O)(R6), SO, SO2, NR6, O, S or CONR6;
C1-C40-alkoxy, which is optionally substituted with one or more substituents R6 and
wherein one or more non-adjacent CH2-groups are optionally substituted by R6C=CR6, C=C, Si(R6)2, Ge(R6)2, Sn(R6)2, C=O, C=S, C=Se, C=NR6, P(=O)(R6), SO, SO2, NR6, O, S or CONR6; - C1-C40-thioalkoxy,
which is optionally substituted with one or more substituents R6 and wherein one or more non-adjacent CH2-groups are optionally substituted by R6C=CR6, C≡C, Si(R6)2, Ge(R6)2, Sn(R6)2, C=O, C=S, C=Se, C=NR6, P(=O)(R6), SO, SO2, NR6, O, S or CONR6; - C2-C40-alkenyl,
which is optionally substituted with one or more substituents R6 and wherein one or more non-adjacent CH2-groups are optionally substituted by R6C=CR6, C≡C, Si(R6)2, Ge(R6)2, Sn(R6)2, C=O, C=S, C=Se, C=NR6, P(=O)(R6), SO, SO2, NR6, O, S or CONR6; - C2-C40-alkynyl,
which is optionally substituted with one or more substituents R6 and wherein one or more non-adjacent CH2-groups are optionally substituted by R6C=CR6, C≡C, Si(R6)2, Ge(R6)2, Sn(R6)2, C=O, C=S, C=Se, C=NR6, P(=O)(R6), SO, SO2, NR6, O, S or CONR6; - C6-C60-aryl,
which is optionally substituted with one or more substituents R6; and - C3-C57-heteroaryl,
which is optionally substituted with one or more substituents R6.
- C1-C40-alkyl,
- R6 is at each occurrence independently from another selected from the group consisting of hydrogen, deuterium, OPh, CF3, CN, F,
- C1-C5-alkyl,
wherein optionally one or more hydrogen atoms are independently from each other substituted by deuterium, CN, CF3, or F; - C1-C5-alkoxy,
wherein optionally one or more hydrogen atoms are independently from each other substituted by deuterium, CN, CF3, or F; - C1-C5-thioalkoxy,
wherein optionally one or more hydrogen atoms are independently from each other substituted by deuterium, CN, CF3, or F; - C2-C5-alkenyl,
wherein optionally one or more hydrogen atoms are independently from each other substituted by deuterium, CN, CF3, or F; - C2-C5-alkynyl,
wherein optionally one or more hydrogen atoms are independently from each other substituted by deuterium, CN, CF3, or F; - C6-C18-aryl,
which is optionally substituted with one or more C1-C5-alkyl substituents; - C3-C17-heteroaryl,
which is optionally substituted with one or more C1-C5-alkyl substituents; - N(C6-C18-aryl)2,
- N(C3-C17-heteroaryl)2; and
- N(C3-C17-heteroaryl)(C6-C18-aryl).
- C1-C5-alkyl,
- The substituents Ra, R3, R4 or R5 independently from each other can optionally form a mono- or polycyclic, aliphatic, aromatic and/or benzo-fused ring system with one or more substituents Ra, R3, R4 or R5.
- According to the invention exactly one ring atom selected from the group consisting of LT, LV and LW is N; exactly one substituent selected from the group consisting of RT, RV and RW is CN; exactly one substituent selected from the group consisting of W, Y and X represents the binding site of a single bond linking the first chemical moiety and one of the two second chemical moieties and exactly one substituent selected from the group consisting of RW, RY and RX represents the binding site of a single bond linking the first chemical moiety and one of the two second chemical moieties.
-
- wherein R1, R2, RT, RV, RI, LT and LV are defined as above.
- YD is the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties.
- RD is the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties.
- LZ is N or C-R2.
- RZ is CN or RI.
- According to this embodiment of the invention, exactly one substituent selected from the group consisting of RT, RV and RZ is CN and exactly one ring atom selected from the group consisting of LT, LV and LZ is N.
- In one embodiment, R1, R2 and RI is at each occurrence independently from another selected from the group consisting of hydrogen (H), methyl, mesityl, tolyl and phenyl. The term tolyl refers to 2-tolyl, 3-tolyl, and 4-tolyl.
- In one embodiment, R1, R2 and RI is at each occurrence independently from another selected from the group consisting of hydrogen (H), methyl, and phenyl.
- In one embodiment, RV is CN.
- In one embodiment, RW is CN.
- In one embodiment, RZ is CN.
- In one embodiment, LV is N.
- In one embodiment, LW is N.
- In one embodiment, LZ is N.
- In one embodiment, RV is CN and LV is N.
- In one embodiment, RV is CN and LW is N.
- In one embodiment, RV is CN and LZ is N.
- In one embodiment, RW is CN and LW is N.
- In one embodiment, RW is CN and LZ is N.
- In one embodiment, RW is CN and LV is N.
- In one embodiment, RZ is CN and LW is N.
- In one embodiment, RZ is CN and LZ is N.
- In one embodiment, RZ is CN and LV is N.
-
- In a further embodiment of the invention, Ra is at each occurrence independently from another selected from the group consisting of H,
- Me,
- iPr,
- tBu,
- CN,
- CF3,
- Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
- pyridinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
- pyrimidinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
- carbazolyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
- triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
- and N(Ph)2.
- In a further embodiment of the invention, Ra is at each occurrence independently from another selected from the group consisting of H,
- Me,
- iPr,
- tBu,
- CN,
- CF3,
- Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
- pyridinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
- pyrimidinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph, and
- triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph.
- In a further embodiment of the invention, Ra is at each occurrence independently from another selected from the group consisting of H,
- Me,
- tBu,
- Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
- triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph.
- In a further embodiment of the invention, Ra is H at each occurrence.
-
- Rb is at each occurrence independently from another selected from the group consisting of deuterium,
- N(R5)2,
- OR5,
- Si(R5)3,
- B(OR5)2,
- OSO2R5,
- CF3,
- CN,
- F,
- Br,
- I,
C1-C40-alkyl,
which is optionally substituted with one or more substituents R5 and wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
C1-C40-alkoxy,
which is optionally substituted with one or more substituents R5 and wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
C1-C40-thioalkoxy,
which is optionally substituted with one or more substituents R5 and wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C=C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
C2-C40-alkenyl,
which is optionally substituted with one or more substituents R5 and
wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
C2-C40-alkynyl,
which is optionally substituted with one or more substituents R5 and wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
C6-C60-aryl,
which is optionally substituted with one or more substituents R5; and
C3-C57-heteroaryl,
which is optionally substituted with one or more substituents R5. - Apart from that the aforementioned definitions apply.
- In one additional embodiment of the invention, the two second chemical moieties each at each occurrence independently from another comprise or consist of a structure of Formula IIc, a structure of Formula IIc-2, a structure of Formula IIc-3 or a structure of Formula IIc-4:
- In a further embodiment of the invention, Rb is at each occurrence independently from another selected from the group consisting of
- Me,
- iPr,
- tBu,
- CN,
- CF3,
- Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
- pyridinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
- carbazolyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
- triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
- and N(Ph)2.
- In a further embodiment of the invention, Rb is at each occurrence independently from another selected from the group consisting of
- Me,
- iPr,
- tBu,
- CN,
- CF3,
- Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
- pyridinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
- pyrimidinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph, and
- triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph.
- In a further embodiment of the invention, Rb is at each occurrence independently from another selected from the group consisting of
- Me,
- tBu,
- Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
- triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph.
-
- In one embodiment, Ra and R5 is at each occurrence independently from another selected from the group consisting of hydrogen (H), methyl (Me), i-propyl (CH(CH3)2) (iPr), t-butyl (tBu), phenyl (Ph), CN, CF3, and diphenylamine (NPh2).
-
- In a preferred embodiment of the invention, the organic molecules comprise or consist of a structure of Formula III and RV is CN.
-
-
- Rc is at each occurrence independently from another selected from the group consisting of Me,
- iPr,
- tBu,
- Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
- pyridinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
- pyrimidinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
- carbazolyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
- triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph,
- and N(Ph)2.
- In a preferred embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IIIa-1.
-
- In a preferred embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IIIb-1.
-
- In a preferred embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IIIc-1.
-
- In a preferred embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IIId-1.
-
- In a preferred embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IV and RV is CN.
-
-
- In a preferred embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IVa-1.
-
- In a preferred embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IVb-1.
-
- In a preferred embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IVc-1.
-
- In a preferred embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IVd-1.
-
- In a preferred embodiment of the invention, the organic molecules comprise or consist of a structure of Formula V and RV is CN.
-
-
- In a preferred embodiment of the invention, the organic molecules comprise or consist of a structure of Formula VI and RV is CN.
-
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula VII and RV is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula VIII and RV is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IX and RV is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula X and RV is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula XI and RV is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula XII and RV is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula XIII and RV is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula XIV and RV is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula XV and RT is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula XVI and RT is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula XVII and RT is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula XVIII and RT is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula XIX and RT is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula XX and RT is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula XXI and RT is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula XXII and RT is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula XXIII and RT is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula XXIV and RT is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula XXV and RT is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula XXVI and RT is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula XXVII and RT is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula XXVIII and RT is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula XXIX and RT is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula XXX and RT is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula XXXI and RV is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula XXXII and RV is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula XXXIII and RT is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula XXXIV and RT is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula XXXV and RT is CN.
-
- In another embodiment of the invention, the organic molecules comprise or consist of a structure of Formula XXXVI and RT is CN.
- In one embodiment of the invention Rc is at each occurrence independently from another selected from the group consisting of
- Me,
- iPr,
- tBu,
- Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3 and Ph; and
- triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3 and Ph.
- As used throughout the present application, the terms "aryl" and "aromatic" may be understood in the broadest sense as any mono-, bi- or polycyclic aromatic moieties. Accordingly, an aryl group contains 6 to 60 aromatic ring atoms, and a heteroaryl group contains 5 to 60 aromatic ring atoms, of which at least one is a heteroatom. Notwithstanding, throughout the application the number of aromatic ring atoms may be given as subscripted number in the definition of certain substituents. In particular, the heteroaromatic ring includes one to three heteroatoms. Again, the terms "heteroaryl" and "heteroaromatic" may be understood in the broadest sense as any mono-, bi- or polycyclic hetero-aromatic moieties that include at least one heteroatom. The heteroatoms may at each occurrence be the same or different and be individually selected from the group consisting of N, O and S. Accordingly, the term "arylene" refers to a divalent substituent that bears two binding sites to other molecular structures and thereby serving as a linker structure. In case, a group in the exemplary embodiments is defined differently from the definitions given here, for example, the number of aromatic ring atoms or number of heteroatoms differs from the given definition, the definition in the exemplary embodiments is to be applied. According to the invention, a condensed (annulated) aromatic or heteroaromatic polycycle is built of two or more single aromatic or heteroaromatic cycles, which formed the polycycle via a condensation reaction.
- In particular, as used throughout the present application the term aryl group or heteroaryl group comprises groups which can be bound via any position of the aromatic or heteroaromatic group, derived from benzene, naphthaline, anthracene, phenanthrene, pyrene, dihydropyrene, chrysene, perylene, fluoranthene, benzanthracene, benzphenanthrene, tetracene, pentacene, benzpyrene, furan, benzofuran, isobenzofuran, dibenzofuran, thiophene, benzothiophene, isobenzothiophene, dibenzothiophene; pyrrole, indole, isoindole, carbazole, pyridine, quinoline, isoquinoline, acridine, phenanthridine, benzo-5,6-quinoline, benzo-6,7-quinoline, benzo-7,8-quinoline, phenothiazine, phenoxazine, pyrazole, indazole, imidazole, benzimidazole, naphthoimidazole, phenanthroimidazole, pyridoimidazole, pyrazinoimidazole, quinoxalinoimidazole, oxazole, benzoxazole, napthooxazole, anthroxazol, phenanthroxazol, isoxazole, 1,2-thiazole, 1,3-thiazole, benzothiazole, pyridazine, benzopyridazine, pyrimidine, benzopyrimidine, 1,3,5-triazine, quinoxaline, pyrazine, phenazine, naphthyridine, carboline, benzocarboline, phenanthroline, 1,2,3-triazole, 1,2,4-triazole, benzotriazole, 1,2,3-oxadiazole, 1,2,4-oxadiazole, 1,2,5-oxadiazole, 1,2,3,4-tetrazine, purine, pteridine, indolizine and benzothiadiazole or combinations of the abovementioned groups.
- As used throughout the present application the term cyclic group may be understood in the broadest sense as any mono-, bi- or polycyclic moieties.
- As used throughout the present application the term biphenyl as a substituent may be understood in the broadest sense as ortho-biphenyl, meta-biphenyl, or para-biphenyl, wherein ortho, meta and para is defined in regard to the binding site to another chemical moiety.
- As used throughout the present application the term alkyl group may be understood in the broadest sense as any linear, branched, or cyclic alkyl substituent. In particular, the term alkyl comprises the substituents methyl (Me), ethyl (Et), n-propyl (nPr), i-propyl (iPr), cyclopropyl, n-butyl (nBu), i-butyl (iBu), s-butyl (sBu), t-butyl(tBu), cyclobutyl, 2-methylbutyl, n-pentyl, s-pentyl, t-pentyl, 2-pentyl, neo-pentyl, cyclopentyl, n-hexyl, s-hexyl, t-hexyl, 2-hexyl, 3-hexyl, neo-hexyl, cyclohexyl, 1-methylcyclopentyl, 2-methylpentyl, n-heptyl, 2-heptyl, 3-heptyl, 4-heptyl, cycloheptyl, 1-methylcyclohexyl, n-octyl, 2-ethylhexyl, cyclooctyl, 1-bicyclo[2,2,2]octyl, 2-bicyclo[2,2,2]-octyl, 2-(2,6-dimethyl)octyl, 3-(3,7-dimethyl)octyl, adamantyl, 2,2,2-trifluorethyl, 1,1-dimethyl-n-hex-1-yl, 1,1-dimethyl-n-hept-1-yl, 1,1-dimethyl-n-oct-1-yl, 1,1-dimethyl-n-dec-1-yl, 1,1-dimethyl-n-dodec-1-yl, 1,1-dimethyl-n-tetradec-1-yl, 1,1-dimethyl-n-hexadec-1-yl, 1,1-dimethyl-n-octadec-1-yl, 1,1-diethyl-n-hex-1-yl, 1,1-diethyl-n-hept-1-yl, 1,1-diethyl-n-oct-1-yl, 1,1-diethyl-n-dec-1-yl, 1,1-diethyl-n-dodec-1-yl, 1,1-diethyl-n-tetradec-1-yl, 1,1-diethyln-n-hexadec-1-yl,1,1-diethyl-n-octadec-1-yl, 1-(n-propyl)-cyclohex-1-yl, 1-(n-butyl)-cyclohex-1-yl, 1-(n-hexyl)-cyclohex-1-yl, 1-(n-octyl)-cyclohex-1-yl and 1-(n-decyl)-cyclohex-1-yl.
- As used throughout the present application the term alkenyl comprises linear, branched, and cyclic alkenyl substituents. The term alkenyl group exemplarily comprises the substituents ethenyl, propenyl, butenyl, pentenyl, cyclopentenyl, hexenyl, cyclohexenyl, heptenyl, cycloheptenyl, octenyl, cyclooctenyl or cyclooctadienyl.
- As used throughout the present application the term alkynyl comprises linear, branched, and cyclic alkynyl substituents. The term alkynyl group exemplarily comprises ethynyl, propynyl, butynyl, pentynyl, hexynyl, heptynyl or octynyl.
- As used throughout the present application the term alkoxy comprises linear, branched, and cyclic alkoxy substituents. The term alkoxy group exemplarily comprises methoxy, ethoxy, n-propoxy, i-propoxy, n-butoxy, i-butoxy, s-butoxy, t-butoxy and 2-methylbutoxy.
- As used throughout the present application the term thioalkoxy comprises linear, branched, and cyclic thioalkoxy substituents, in which the O of the exemplarily alkoxy groups is replaced by S.
- As used throughout the present application, the terms "halogen" and "halo" may be understood in the broadest sense as being preferably fluorine, chlorine, bromine or iodine.
- Whenever hydrogen (H) is mentioned herein, it could also be replaced by deuterium at each occurrence.
- It is understood that when a molecular fragment is described as being a substituent or otherwise attached to another moiety, its name may be written as if it were a fragment (e.g. naphtyl, dibenzofuryl) or as if it were the whole molecule (e.g. naphthalene, dibenzofuran). As used herein, these different ways of designating a substituent or attached fragment are considered to be equivalent.
- In one embodiment, the organic molecules according to the invention have an excited state lifetime of not more than 150 µs, of not more than 100 µs, in particular of not more than 50 µs, more preferably of not more than 10 µs or not more than 7 µs in a film of poly(methyl methacrylate) (PMMA) with 10 % by weight of organic molecule at room temperature.
- In one embodiment of the invention, the organic molecules according to the invention represent thermally-activated delayed fluorescence (TADF) emitters, which exhibit a ΔEST value, which corresponds to the energy difference between the first excited singlet state (S1) and the first excited triplet state (T1), of less than 5000 cm-1, preferably less than 3000 cm-1, more preferably less than 1500 cm-1, even more preferably less than 1000 cm-1 or even less than 500 cm-1.
- In a further embodiment of the invention, the organic molecules according to the invention have an emission peak in the visible or nearest ultraviolet range, i.e., in the range of a wavelength of from 380 to 800 nm, with a full width at half maximum of less than 0.50 eV, preferably less than 0.48 eV, more preferably less than 0.45 eV, even more preferably less than 0.43 eV or even less than 0.40 eV in a film of poly(methyl methacrylate) (PMMA) with 10 % by weight of organic molecule at room temperature.
- In a further embodiment of the invention, the organic molecules according to the invention have a "blue material index" (BMI), calculated by dividing the photoluminescence quantum yield (PLQY) in % by the CIEy color coordinate of the emitted light, of more than 150, in particular more than 200, preferably more than 250, more preferably of more than 300 or even more than 500.
- Orbital and excited state energies can be determined either by means of experimental methods or by calculations employing quantum-chemical methods, in particular density functional theory calculations. The energy of the highest occupied molecular orbital EHOMO is determined by methods known to the person skilled in the art from cyclic voltammetry measurements with an accuracy of 0.1 eV. The energy of the lowest unoccupied molecular orbital ELUMO is calculated as EHOMO + Egap, wherein Egap is determined as follows: For host compounds, the onset of the emission spectrum of a film with 10 % by weight of host in poly(methyl methacrylate) (PMMA) is used as Egap, unless stated otherwise. For emitter molecules, Egap is determined as the energy at which the excitation and emission spectra of a film with 10 % by weight of emitter in PMMA cross.
- The energy of the first excited triplet state T1 is determined from the onset of the emission spectrum at low temperature, typically at 77 K. For host compounds, where the first excited singlet state and the lowest triplet state are energetically separated by > 0.4 eV, the phosphorescence is usually visible in a steady-state spectrum in 2-Me-THF. The triplet energy can thus be determined as the onset of the phosphorescence spectrum. For TADF emitter molecules, the energy of the first excited triplet state T1 is determined from the onset of the delayed emission spectrum at 77 K, if not otherwise stated measured in a film of PMMA with 10 % by weight of emitter. Both for host and emitter compounds, the energy of the first excited singlet state S1 is determined from the onset of the emission spectrum, if not otherwise stated measured in a film of PMMA with 10 % by weight of host or emitter compound.
- The onset of an emission spectrum is determined by computing the intersection of the tangent to the emission spectrum with the x-axis. The tangent to the emission spectrum is set at the high-energy side of the emission band and at the point at half maximum of the maximum intensity of the emission spectrum.
-
- According to the invention, in the reaction for the synthesis of E1 a boronic acid or an equivalent boronic acid ester can be used instead of a boronic pinacol ester. Exemplary boronic acid esters or boronic acids are 4-cyano-2-fluorophenylboronic ester or acid, 5-cyano-2-fluorophenylboronic ester or acid, 3-cyano-2-fluorophenylboronic ester or acid, 6-cyano-2-fluorophenylboronic ester or acid, 2-cyano-3-fluorophenylboronic ester or acid, 4-cyano-3-fluorophenylboronic ester or acid, 5-cyano-3-fluorophenylboronic ester or acid, 6-cyano-3-fluorophenylboronic ester or acid, 2-cyano-4-fluorophenylboronic ester or acid and 3-cyano-4-fluorophenylboronic ester or acid.
- Preferably, the halo-fluoro-pyridine is selected from chloro-fluoropyridine and bromo-fluoropyridine. Exemplary halo-fluoro-pyridines are 4-chloro-3-fluoro-pyridine, 4-chloro-2-fluoro-pyridine, 3-chloro-4-fluoro-pyridine, 3-chloro-5-fluoro-pyridine, 3-chloro-6-fluoro-pyridine, 3-chloro-2-fluoro-pyridine, 2-chloro-3-fluoro-pyridine, 2-chloro-4-fluoro-pyridine, 2-chloro-5-fluoro-pyridine, 2-chloro-6-fluoro-pyridine, 3-bromo-4-fluoro-pyridine, 3-bromo-5-fluoro-pyridine, 3-bromo-6-fluoro-pyridine, 3-bromo-2-fluoro-pyridine, 2-bromo-3-fluoro-pyridine, 2-bromo-4-fluoro-pyridine, 2-bromo-5-fluoro-pyridine and 2-bromo-6-fluoro-pyridine, which are each substituted with either one R1 and two R2 or two R1 and one R2 at the remaining positions.
- For the reaction of a nitrogen heterocycle in a nucleophilic aromatic substitution with an aryl halide, preferably an aryl fluoride, typical conditions include the use of a base, such as tribasic potassium phosphate or sodium hydride, for example, in an aprotic polar solvent, such as dimethyl sulfoxide (DMSO) or N,N-dimethylformamide (DMF), for example.
- An alternative synthesis route comprises the introduction of a nitrogen heterocycle via copper- or palladium-catalyzed coupling to an aryl halide or aryl pseudohalide, preferably an aryl bromide, an aryl iodide, aryl triflate or an aryl tosylate.
- A further aspect of the invention relates to the use of an organic molecule according to the invention as a luminescent emitter or as an absorber, and/or as host material and/or as electron transport material, and/or as hole injection material, and/or as hole blocking material in an optoelectronic device.
- The optoelectronic device may be understood in the broadest sense as any device based on organic materials that is suitable for emitting light in the visible or nearest ultraviolet (UV) range, i.e., in the range of a wavelength of from 380 to 800 nm. More preferably, the optoelectronic device may be able to emit light in the visible range, i.e., of from 400 to 800 nm.
- In the context of such use, the optoelectronic device is more particularly selected from the group consisting of:
- organic light-emitting diodes (OLEDs),
- light-emitting electrochemical cells,
- OLED sensors, especially in gas and vapour sensors not hermetically externally shielded,
- organic diodes,
- organic solar cells,
- organic transistors,
- organic field-effect transistors,
- organic lasers and
- down-conversion elements.
- In a preferred embodiment in the context of such use, the optoelectronic device is a device selected from the group consisting of an organic light emitting diode (OLED), a light emitting electrochemical cell (LEC), and a light-emitting transistor.
- In the case of the use, the fraction of the organic molecule according to the invention in the emission layer in an optoelectronic device, more particularly in OLEDs, is 1 % to 99 % by weight, more particularly 5 % to 80 % by weight. In an alternative embodiment, the proportion of the organic molecule in the emission layer is 100 % by weight.
- In one embodiment, the light-emitting layer comprises not only the organic molecules according to the invention but also a host material whose triplet (T1) and singlet (S1) energy levels are energetically higher than the triplet (T1) and singlet (S1) energy levels of the organic molecule.
- A further aspect of the invention relates to a composition comprising or consisting of:
- (a) at least one organic molecule according to the invention, in particular in the form of an emitter and/or a host, and
- (b) one or more emitter and/or host materials, which differ from the organic molecule according to the invention and
- (c) optional one or more dyes and/or one or more solvents.
- In one embodiment, the light-emitting layer comprises (or (essentially) consists of) a composition comprising or consisting of:
- (a) at least one organic molecule according to the invention, in particular in the form of an emitter and/or a host, and
- (b) one or more emitter and/or host materials, which differ from the organic molecule according to the invention and
- (c) optional one or more dyes and/or one or more solvents.
- Particularly preferably the light-emitting layer EML comprises (or (essentially) consists of) a composition comprising or consisting of:
- (i) 1-50 % by weight, preferably 5-40 % by weight, in particular 10-30 % by weight, of one or more organic molecules according to the invention E;
- (ii) 5-99 % by weight, preferably 30-94.9 % by weight, in particular 40-89% by weight, of at least one host compound H; and
- (iii) optionally 0-94 % by weight, preferably 0.1-65 % by weight, in particular 1-50 % by weight, of at least one further host compound D with a structure differing from the structure of the molecules according to the invention; and
- (iv) optionally 0-94 % by weight, preferably 0-65 % by weight, in particular 0-50 % by weight, of a solvent; and
- (v) optionally 0-30 % by weight, in particular 0-20 % by weight, preferably 0-5 % by weight, of at least one further emitter molecule F with a structure differing from the structure of the molecules according to the invention.
- Preferably, energy can be transferred from the host compound H to the one or more organic molecules according to the invention E, in particular transferred from the first excited triplet state T1(H) of the host compound H to the first excited triplet state T1(E) of the one or more organic molecules according to the invention E and/ or from the first excited singlet state S1(H) of the host compound H to the first excited singlet state S1(E) of the one or more organic molecules according to the invention E.
- In a further embodiment, the light-emitting layer EML comprises (or (essentially) consists of) a composition comprising or consisting of:
- (i) 1-50 % by weight, preferably 5-40 % by weight, in particular 10-30 % by weight, of one organic molecule according to the invention E;
- (ii) 5-99 % by weight, preferably 30-94.9 % by weight, in particular 40-89% by weight, of one host compound H; and
- (iii) optionally 0-94 % by weight, preferably 0.1-65 % by weight, in particular 1-50 % by weight, of at least one further host compound D with a structure differing from the structure of the molecules according to the invention; and
- (iv) optionally 0-94 % by weight, preferably 0-65 % by weight, in particular 0-50 % by weight, of a solvent; and
- (v) optionally 0-30 % by weight, in particular 0-20 % by weight, preferably 0-5 % by weight, of at least one further emitter molecule F with a structure differing from the structure of the molecules according to the invention.
- In one embodiment, the host compound H has a highest occupied molecular orbital HOMO(H) having an energy EHOMO(H) in the range of from -5 to -6.5 eV and the at least one further host compound D has a highest occupied molecular orbital HOMO(D) having an energy EHOMO(D), wherein EHOMO(H) > EHOMO(D).
- In a further embodiment, the host compound H has a lowest unoccupied molecular orbital LUMO(H) having an energy ELUMO(H) and the at least one further host compound D has a lowest unoccupied molecular orbital LUMO(D) having an energy ELUMO(D), wherein ELUMO(H) > ELUMO(D).
- In one embodiment, the host compound H has a highest occupied molecular orbital HOMO(H) having an energy EHOMO(H) and a lowest unoccupied molecular orbital LUMO(H) having an energy ELUMO(H), and
the at least one further host compound D has a highest occupied molecular orbital HOMO(D) having an energy EHOMO(D) and a lowest unoccupied molecular orbital LUMO(D) having an energy ELUMO(D),
the organic molecule according to the invention E has a highest occupied molecular orbital HOMO(E) having an energy EHOMO(E) and a lowest unoccupied molecular orbital LUMO(E) having an energy ELUMO(E),
wherein
EHOMO(H) > EHOMO(D) and the difference between the energy level of the highest occupied molecular orbital HOMO(E) of the organic molecule according to the invention E (EHOMO(E)) and the energy level of the highest occupied molecular orbital HOMO(H) of the host compound H (EHOMO(H)) is between -0.5 eV and 0.5 eV, more preferably between -0.3 eV and 0.3 eV, even more preferably between -0.2 eV and 0.2 eV or even between -0.1 eV and 0.1 eV; and ELUMO(H) > ELUMO(Q) and the difference between the energy level of the lowest unoccupied molecular orbital LUMO(E) of the organic molecule according to the invention E (ELUMO(E)) and the lowest unoccupied molecular orbital LUMO(D) of the at least one further host compound D (ELUMO(D)) is between -0.5 eV and 0.5 eV, more preferably between -0.3 eV and 0.3 eV, even more preferably between -0.2 eV and 0.2 eV or even between -0.1 eV and 0.1 eV. - In a further aspect, the invention relates to an optoelectronic device comprising an organic molecule or a composition of the type described here, more particularly in the form of a device selected from the group consisting of organic light-emitting diode (OLED), light-emitting electrochemical cell, OLED sensor, more particularly gas and vapour sensors not hermetically externally shielded, organic diode, organic solar cell, organic transistor, organic field-effect transistor, organic laser and down-conversion element.
- In a preferred embodiment, the optoelectronic device is a device selected from the group consisting of an organic light emitting diode (OLED), a light emitting electrochemical cell (LEC), and a light-emitting transistor.
- In one embodiment of the optoelectronic device of the invention, the organic molecule according to the invention E is used as emission material in a light-emitting layer EML.
- In one embodiment of the optoelectronic device of the invention the light-emitting layer EML consists of the composition according to the invention described here.
- For example, when the optoelectronic device is an OLED, it may exhibit the following layer structure:
- 1. substrate
- 2. anode layer A
- 3. hole injection layer, HIL
- 4. hole transport layer, HTL
- 5. electron blocking layer, EBL
- 6. emitting layer, EML
- 7. hole blocking layer, HBL
- 8. electron transport layer, ETL
- 9. electron injection layer, EIL
- 10. cathode layer,
- Furthermore, the optoelectronic device may optionally comprise one or more protective layers protecting the device from damaging exposure to harmful species in the environment including, exemplarily moisture, vapor and/or gases.
- In one embodiment of the invention, the optoelectronic device is an OLED, which exhibits the following inverted layer structure:
- 1. substrate
- 2. cathode layer
- 3. electron injection layer, EIL
- 4. electron transport layer, ETL
- 5. hole blocking layer, HBL
- 6. emitting layer, B
- 7. electron blocking layer, EBL
- 8. hole transport layer, HTL
- 9. hole injection layer, HIL
- 10. anode layer A
- Wherein the OLED with an inverted layer structure comprises each layer only optionally, different layers may be merged and the OLED may comprise more than one layer of each layer types defined above.
- In one embodiment of the invention, the optoelectronic device is an OLED, which may exhibit stacked architecture. In this architecture, contrary to the typical arrangement, where the OLEDs are placed side by side, the individual units are stacked on top of each other. Blended light may be generated with OLEDs exhibiting a stacked architecture, in particular white light may be generated by stacking blue, green and red OLEDs. Furthermore, the OLED exhibiting a stacked architecture may optionally comprise a charge generation layer (CGL), which is typically located between two OLED subunits and typically consists of a n-doped and p-doped layer with the n-doped layer of one CGL being typically located closer to the anode layer.
- In one embodiment of the invention, the optoelectronic device is an OLED, which comprises two or more emission layers between anode and cathode. In particular, this so-called tandem OLED comprises three emission layers, wherein one emission layer emits red light, one emission layer emits green light and one emission layer emits blue light, and optionally may comprise further layers such as charge generation layers, blocking or transporting layers between the individual emission layers. In a further embodiment, the emission layers are adjacently stacked. In a further embodiment, the tandem OLED comprises a charge generation layer between each two emission layers. In addition, adjacent emission layers or emission layers separated by a charge generation layer may be merged.
- The substrate may be formed by any material or composition of materials. Most frequently, glass slides are used as substrates. Alternatively, thin metal layers (e.g., copper, gold, silver or aluminum films) or plastic films or slides may be used. This may allow a higher degree of flexibility. The anode layer A is mostly composed of materials allowing to obtain an (essentially) transparent film. As at least one of both electrodes should be (essentially) transparent in order to allow light emission from the OLED, either the anode layer A or the cathode layer C is transparent. Preferably, the anode layer A comprises a large content or even consists of transparent conductive oxides (TCOs). Such anode layer A may exemplarily comprise indium tin oxide, aluminum zinc oxide, fluorine doped tin oxide, indium zinc oxide, PbO, SnO, zirconium oxide, molybdenum oxide, vanadium oxide, wolfram oxide, graphite, doped Si, doped Ge, doped GaAs, doped polyaniline, doped polypyrrol and/or doped polythiophene. Particularly preferably, the anode layer A (essentially) consists of indium tin oxide (ITO) (e.g., (InO3)0.9(SnO2)0.1). The roughness of the anode layer A caused by the transparent conductive oxides (TCOs) may be compensated by using a hole injection layer (HIL). Further, the HIL may facilitate the injection of quasi charge carriers (i.e., holes) in that the transport of the quasi charge carriers from the TCO to the hole transport layer (HTL) is facilitated. The hole injection layer (HIL) may comprise poly-3,4-ethylendioxy thiophene (PEDOT), polystyrene sulfonate (PSS), MoO2, V2O5, CuPC or Cul, in particular a mixture of PEDOT and PSS. The hole injection layer (HIL) may also prevent the diffusion of metals from the anode layer A into the hole transport layer (HTL). The HIL may exemplarily comprise PEDOT:PSS (poly-3,4-ethylendioxy thiophene: polystyrene sulfonate), PEDOT (poly-3,4-ethylendioxy thiophene), mMTDATA (4,4',4"-tris[phenyl(m-tolyl)amino]triphenylamine), Spiro-TAD (2,2',7,7'-tetrakis(n,n-diphenylamino)-9,9'-spirobifluorene), DNTPD (N1,N1'-(biphenyl-4,4'-diyl)bis(N1-phenyl-N4,N4-di-m-tolylbenzene-1,4-diamine), NPB (N,N'-nis-(1-naphthalenyl)-N,N'-bisphenyl-(1,1'-biphenyl)-4,4'-diamine), NPNPB (N,N'-diphenyl-N,N'-di-[4-(N,N-diphenyl-amino)phenyl]benzidine), MeO-TPD (N,N,N',N'-tetrakis(4-methoxyphenyl)benzidine), HAT-CN (1,4,5,8,9,11-hexaazatriphenylen-hexacarbonitrile) and/or Spiro-NPD (N,N'-diphenyl-N,N'-bis-(1-naphthyl)-9,9'-spirobifluorene-2,7-diamine).
- Adjacent to the anode layer A or hole injection layer (HIL) typically a hole transport layer (HTL) is located. Herein, any hole transport compound may be used. Exemplarily, electron-rich heteroaromatic compounds such as triarylamines and/or carbazoles may be used as hole transport compound. The HTL may decrease the energy barrier between the anode layer A and the light-emitting layer EML. The hole transport layer (HTL) may also be an electron blocking layer (EBL). Preferably, hole transport compounds bear comparably high energy levels of their triplet states T1. Exemplarily the hole transport layer (HTL) may comprise a star-shaped heterocycle such as tris(4-carbazoyl-9-ylphenyl)amine (TCTA), poly-TPD (poly(4-butylphenyl-diphenyl-amine)), [alpha]-NPD (poly(4-butylphenyl-diphenyl-amine)), TAPC (4,4'-cyclohexyliden-bis[N,N-bis(4-methylphenyl)benzenamine]), 2-TNATA (4,4',4"-tris[2-naphthyl(phenyl)amino]triphenylamine), Spiro-TAD, DNTPD, NPB, NPNPB, MeO-TPD, HAT-CN and/or TrisPcz (9,9'-diphenyl-6-(9-phenyl-9H-carbazol-3-yl)-9H,9'H-3,3'-bicarbazole). In addition, the HTL may comprise a p-doped layer, which may be composed of an inorganic or organic dopant in an organic hole-transporting matrix. Transition metal oxides such as vanadium oxide, molybdenum oxide or tungsten oxide may exemplarily be used as inorganic dopant. Tetrafluorotetracyanoquinodimethane (F4-TCNQ), copper-pentafluorobenzoate (Cu(I)pFBz) or transition metal complexes may exemplarily be used as organic dopant.
- The EBL may exemplarily comprise mCP (1,3-bis(carbazol-9-yl)benzene), TCTA, 2-TNATA, mCBP (3,3-di(9H-carbazol-9-yl)biphenyl), tris-Pcz, CzSi (9-(4-tert-Butylphenyl)-3,6-bis(triphenylsilyl)-9H-carbazole), and/or DCB (N,N'-dicarbazolyl-1,4-dimethylbenzene).
- Adjacent to the hole transport layer (HTL), typically, the light-emitting layer EML is located. The light-emitting layer EML comprises at least one light emitting molecule. Particularly, the EML comprises at least one light emitting molecule according to the invention E. In one embodiment, the light-emitting layer comprises only the organic molecules according to the invention E. Typically, the EML additionally comprises one or more host materials H. Exemplarily, the host material H is selected from CBP (4,4'-Bis-(N-carbazolyl)-biphenyl), mCP, mCBP Sif87 (dibenzo[b,d]thiophen-2-yltriphenylsilane), CzSi, Sif88 (dibenzo[b,d]thiophen-2-yl)diphenylsilane), DPEPO (bis[2-(diphenylphosphino)phenyl] ether oxide), 9-[3-(dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3-(dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3-(dibenzothiophen-2-yl)phenyl]-9H-carbazole, 9-[3,5-bis(2-dibenzofuranyl)phenyl]-9H-carbazole, 9-[3,5-bis(2-dibenzothiophenyl)phenyl]-9H-carbazole, T2T (2,4,6-tris(biphenyl-3-yl)-1,3,5-triazine), T3T (2,4,6-tris(triphenyl-3-yl)-1,3,5-triazine) and/or TST (2,4,6-tris(9,9'-spirobifluorene-2-yl)-1,3,5-triazine). The host material H typically should be selected to exhibit first triplet (T1) and first singlet (S1) energy levels, which are energetically higher than the first triplet (T1) and first singlet (S1) energy levels of the organic molecule.
- In one embodiment of the invention, the EML comprises a so-called mixed-host system with at least one hole-dominant host and one electron-dominant host. In a particular embodiment, the EML comprises exactly one light emitting molecule according to the invention E and a mixed-host system comprising T2T as electron-dominant host and a host selected from CBP, mCP, mCBP, 9-[3-(dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3-(dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3-(dibenzothiophen-2-yl)phenyl]-9H-carbazole, 9-[3,5-bis(2-dibenzofuranyl)phenyl]-9H-carbazole and 9-[3,5-bis(2-dibenzothiophenyl)phenyl]-9H-carbazole as hole-dominant host. In a further embodiment the EML comprises 50-80 % by weight, preferably 60-75 % by weight of a host selected from CBP, mCP, mCBP, 9-[3-(dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3-(dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3-(dibenzothiophen-2-yl)phenyl]-9H-carbazole, 9-[3,5-bis(2-dibenzofuranyl)phenyl]-9H-carbazole and 9-[3,5-bis(2-dibenzothiophenyl)phenyl]-9H-carbazole; 10-45 % by weight, preferably 15-30 % by weight of T2T and 5-40 % by weight, preferably 10-30 % by weight of light emitting molecule according to the invention.
- Adjacent to the light-emitting layer EML an electron transport layer (ETL) may be located. Herein, any electron transporter may be used. Exemplarily, electron-poor compounds such as, e.g., benzimidazoles, pyridines, triazoles, oxadiazoles (e.g., 1,3,4-oxadiazole), phosphinoxides and sulfone, may be used. An electron transporter may also be a star-shaped heterocycle such as 1,3,5-tri(1-phenyl-1H-benzo[d]imidazol-2-yl)phenyl (TPBi). The ETL may comprise NBphen (2,9-bis(naphthalen-2-yl)-4,7-diphenyl-1,10-phenanthroline), Alq3 (Aluminum-tris(8-hydroxyquinoline)), TSPO1 (diphenyl-4-triphenylsilylphenyl-phosphinoxide), BPyTP2 (2,7-di(2,2'-bipyridin-5-yl)triphenyle), Sif87 (dibenzo[b,d]thiophen-2-yltriphenylsilane), Sif88 (dibenzo[b,d]thiophen-2-yl)diphenylsilane), BmPyPhB (1,3-bis[3,5-di(pyridin-3-yl)phenyl]benzene) and/or BTB (4,4'-bis-[2-(4,6-diphenyl-1,3,5-triazinyl)]-1,1'-biphenyl). Optionally, the ETL may be doped with materials such as Liq. The electron transport layer (ETL) may also block holes or a holeblocking layer (HBL) is introduced.
The HBL may exemplarily comprise BCP (2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline = Bathocuproine), BAlq (bis(8-hydroxy-2-methylquinoline)-(4-phenylphenoxy)aluminum), NBphen (2,9-bis(naphthalen-2-yl)-4,7-diphenyl-1,10-phenanthroline), Alq3 (Aluminum-tris(8-hydroxyquinoline)), TSPO1 (diphenyl-4-triphenylsilylphenyl-phosphinoxide), T2T (2,4,6-tris(biphenyl-3-yl)-1,3,5-triazine), T3T (2,4,6-tris(triphenyl-3-yl)-1,3,5-triazine), TST (2,4,6-tris(9,9'-spirobifluorene-2-yl)-1,3,5-triazine), and/or TCB/TCP (1,3,5-tris(N-carbazolyl)benzol/ 1,3,5-tris(carbazol)-9-yl) benzene). - Adjacent to the electron transport layer (ETL), a cathode layer C may be located. Exemplarily, the cathode layer C may comprise or may consist of a metal (e.g., Al, Au, Ag, Pt, Cu, Zn, Ni, Fe, Pb, LiF, Ca, Ba, Mg, In, W, or Pd) or a metal alloy. For practical reasons, the cathode layer may also consist of (essentially) intransparent metals such as Mg, Ca or Al. Alternatively or additionally, the cathode layer C may also comprise graphite and or carbon nanotubes (CNTs). Alternatively, the cathode layer C may also consist of nanoscalic silver wires.
- An OLED may further, optionally, comprise a protection layer between the electron transport layer (ETL) and the cathode layer C (which may be designated as electron injection layer (EIL)). This layer may comprise lithium fluoride, cesium fluoride, silver, Liq (8-hydroxyquinolinolatolithium), Li2O, BaF2, MgO and/or NaF.
- Optionally, also the electron transport layer (ETL) and/or a hole blocking layer (HBL) may comprise one or more host compounds H.
- In order to modify the emission spectrum and/or the absorption spectrum of the light-emitting layer EML further, the light-emitting layer EML may further comprise one or more further emitter molecules F. Such an emitter molecule F may be any emitter molecule known in the art. Preferably such an emitter molecule F is a molecule with a structure differing from the structure of the molecules according to the invention E. The emitter molecule F may optionally be a TADF emitter. Alternatively, the emitter molecule F may optionally be a fluorescent and/or phosphorescent emitter molecule which is able to shift the emission spectrum and/or the absorption spectrum of the light-emitting layer EML. Exemplarily, the triplet and/or singlet excitons may be transferred from the emitter molecule according to the invention E to the emitter molecule F before relaxing to the ground state S0 by emitting light typically red-shifted in comparison to the light emitted by emitter molecule E. Optionally, the emitter molecule F may also provoke two-photon effects (i.e., the absorption of two photons of half the energy of the absorption maximum).
- Optionally, an optoelectronic device (e.g., an OLED) may exemplarily be an essentially white optoelectronic device. For example, such a white optoelectronic device may comprise at least one (deep) blue emitter molecule and one or more emitter molecules emitting green and/or red light. Then, there may also optionally be energy transmittance between two or more molecules as described above.
- As used herein, if not defined more specifically in the particular context, the designation of the colors of emitted and/or absorbed light is as follows:
- violet:
- wavelength range of >380-420 nm;
- deep blue:
- wavelength range of >420-480 nm;
- sky blue:
- wavelength range of >480-500 nm;
- green:
- wavelength range of >500-560 nm;
- yellow:
- wavelength range of >560-580 nm;
- orange:
- wavelength range of >580-620 nm;
- red:
- wavelength range of >620-800 nm.
- With respect to emitter molecules, such colors refer to the emission maximum. Therefore, exemplarily, a deep blue emitter has an emission maximum in the range of from >420 to 480 nm, a sky blue emitter has an emission maximum in the range of from >480 to 500 nm, a green emitter has an emission maximum in a range of from >500 to 560 nm, a red emitter has an emission maximum in a range of from >620 to 800 nm.
- A deep blue emitter may preferably have an emission maximum of below 480 nm, more preferably below 470 nm, even more preferably below 465 nm or even below 460 nm. It will typically be above 420 nm, preferably above 430 nm, more preferably above 440 nm or even above 450 nm.
- Accordingly, a further aspect of the present invention relates to an OLED, which exhibits an external quantum efficiency at 1000 cd/m2 of more than 8 %, more preferably of more than 10 %, more preferably of more than 13 %, even more preferably of more than 15 % or even more than 20 % and/or exhibits an emission maximum between 420 nm and 500 nm, preferably between 430 nm and 490 nm, more preferably between 440 nm and 480 nm, even more preferably between 450 nm and 470 nm and/or exhibits a LT80 value at 500 cd/m2 of more than 100 h, preferably more than 200 h, more preferably more than 400 h, even more preferably more than 750 h or even more than 1000 h. Accordingly, a further aspect of the present invention relates to an OLED, whose emission exhibits a CIEy color coordinate of less than 0.45, preferably less than 0.30, more preferably less than 0.20 or even more preferably less than 0.15 or even less than 0.10.
- A further aspect of the present invention relates to an OLED, which emits light at a distinct color point. According to the present invention, the OLED emits light with a narrow emission band (small full width at half maximum (FWHM)). In one aspect, the OLED according to the invention emits light with a FWHM of the main emission peak of less than 0.50 eV, preferably less than 0.48 eV, more preferably less than 0.45 eV, even more preferably less than 0.43 eV or even less than 0.40 eV.
- A further aspect of the present invention relates to an OLED, which emits light with CIEx and CIEy color coordinates close to the CIEx (= 0.131) and CIEy (= 0.046) color coordinates of the primary color blue (CIEx = 0.131 and CIEy = 0.046) as defined by ITU-R Recommendation BT.2020 (Rec. 2020) and thus is suited for the use in Ultra High Definition (UHD) displays, e.g. UHD-TVs. Accordingly, a further aspect of the present invention relates to an OLED, whose emission exhibits a CIEx color coordinate of between 0.02 and 0.30, preferably between 0.03 and 0.25, more preferably between 0.05 and 0.20 or even more preferably between 0.08 and 0.18 or even between 0.10 and 0.15 and/ or a a CIEy color coordinate of between 0.00 and 0.45, preferably between 0.01 and 0.30, more preferably between 0.02 and 0.20 or even more preferably between 0.03 and 0.15 or even between 0.04 and 0.10.
- In a further aspect, the invention relates to a method for producing an optoelectronic component. In this case an organic molecule of the invention is used.
- The optoelectronic device, in particular the OLED according to the present invention can be fabricated by any means of vapor deposition and/ or liquid processing. Accordingly, at least one layer is
- prepared by means of a sublimation process,
- prepared by means of an organic vapor phase deposition process,
- prepared by means of a carrier gas sublimation process,
- solution processed or printed.
- The methods used to fabricate the optoelectronic device, in particular the OLED according to the present invention are known in the art. The different layers are individually and successively deposited on a suitable substrate by means of subsequent deposition processes. The individual layers may be deposited using the same or differing deposition methods.
- Vapor deposition processes exemplarily comprise thermal (co)evaporation, chemical vapor deposition and physical vapor deposition. For active matrix OLED display, an AMOLED backplane is used as substrate. The individual layer may be processed from solutions or dispersions employing adequate solvents. Solution deposition process exemplarily comprise spin coating, dip coating and jet printing. Liquid processing may optionally be carried out in an inert atmosphere (e.g., in a nitrogen atmosphere) and the solvent may optionally be completely or partially removed by means known in the state of the art.
-
-
- 4-chloro-3-fluoropyridine E2 (1.00 equivalents), 5-cyano-2-fluorophenylboronic ester (1.05 equivalents), Pd2(dba)3 (0.04 equivalent), 2-dicyclohexylphosphino-2',6'-dimethoxybiphenyl (SPhos) (0.16 equivalents) and tribasic potassium phosphate (2.50 equivalents) are stirred under nitrogen atmosphere in a dioxane/water mixture (ratio of 10:1) at 110 °C for 2 h. To the reaction mixture Celite ® and active carbon are added and stirred at 110°C for 15 min. Subsequently the reaction mixture is hot filtered and the residue washed with dioxane. The reaction mixture is poured into 200 mL of a saturated sodium chloride solution and extracted with ethyl acetate. The combined organic phases are washed with saturated sodium chloride solution, dried over MgSO4 and the solvent is evaporated under reduced pressure.
The residue is purified by chromatography (28 % yield) or alternatively is stirred in hot ethanol and filtered. After concentrating the solution under reduced pressure, Z2 is washed with ethyl acetate and obtained as solid. -
- The synthesis of Z2 is carried out according to AAV1, wherein 4-chloro-3-fluoropyridine E3 reacts with 4-cyano-2-fluorophenylboronic acid (45% yield).
-
- The synthesis of Z3 is carried out according to AAV1, wherein 3-bromo-4-fluoropyridine E4 reacts with 4-cyano-2-fluorophenylboronic ester (27 % yield).
-
- The synthesis of Z4 is carried out according to AAV1, wherein 3-bromo-4-fluoropyridine E4 reacts with 5-cyano-2-fluorophenylboronic ester.
-
- Z1, Z2, Z3 or Z4(1 equivalent each), the corresponding donor molecule D-H (2.00 equivalents) and tribasic potassium phosphate (5.00 equivalents) are suspended under nitrogen atmosphere in DMSO and stirred at 120 °C (20 h). Subsequently the reaction mixture is poured into a saturated sodium chloride solution and the precipitate is filtered and washed with water. The solid is then dissolved in dichloromethane, dried over MgSO4 and the solvent is evaporated under reduced pressure. The crude product is purified by recrystallization out of ethanol or by flash chromatography. The product is obtained as a solid.
- In particular, the donor molecule D-H is a 3,6-substituted carbazole (e.g., 3,6-dimethylcarbazole, 3,6-diphenylcarbazole, 3,6-di-tert-butylcarbazole), a 2,7-substituted carbazole (e.g., 2,7-dimethylcarbazole, 2,7-diphenylcarbazole, 2,7-di-tert-butylcarbazole), a 1,8-substituted carbazole (e.g., 1,8-dimethylcarbazole, 1,8-diphenylcarbazole, 1,8-di-tert-butylcarbazole), a 1-substituted carbazole (e.g., 1-methylcarbazole, 1-phenylcarbazole, 1-tert-butylcarbazole), a 2-substituted carbazole (e.g., 2-methylcarbazole, 2-phenylcarbazole, 2-tert-butylcarbazole), or a 3-substituted carbazole (e.g., 3-methylcarbazole, 3-phenylcarbazole, 3-tert-butylcarbazole).
- Exemplarily a halogen-substituted carbazole, particularly 3-bromocarbazole, can be used as D-H.
In a subsequent reaction a boronic acid ester functional group or boronic acid functional group may be exemplarily introduced at the position of the one or more halogen substituents, which was introduced via D-H, to yield the corresponding carbazol-3-ylboronic acid ester or carbazol-3-ylboronic acid, e.g., via the reaction with bis(pinacolato)diboron (CAS No. 73183-34-3). Subsequently, one or more substituents Ra may be introduced in place of the boronic acid ester group or the boronic acid group via a coupling reaction with the corresponding halogenated reactant Ra-Hal, preferably Ra-Cl and Ra-Br.
Alternatively, one or more substituents Ra may be introduced at the position of the one or more halogen substituents, which was introduced via D-H, via the reaction with a boronic acid of the substituent Ra[Ra-B(OH)2] or a corresponding boronic acid ester. - Cyclic voltammograms are measured from solutions having concentration of 10-3 mol/L of the organic molecules in dichloromethane or a suitable solvent and a suitable supporting electrolyte (e.g. 0.1 mol/L of tetrabutylammonium hexafluorophosphate). The measurements are conducted at room temperature under nitrogen atmosphere with a three-electrode assembly (Working and counter electrodes: Pt wire, reference electrode: Pt wire) and calibrated using FeCp2/FeCp2 + as internal standard. The HOMO data was corrected using ferrocene as internal standard against a saturated calomel electrode (SCE).
- Molecular structures are optimized employing the BP86 functional and the resolution of identity approach (RI). Excitation energies are calculated using the (BP86) optimized structures employing Time-Dependent DFT (TD-DFT) methods. Orbital and excited state energies are calculated with the B3LYP functional. Def2-SVP basis sets (and a m4-grid for numerical integration are used. The Turbomole program package is used for all calculations.
- The sample concentration is 10 mg/ml, dissolved in a suitable solvent.
- Program: 1) 3 s at 400 U/min; 20 s at 1000 U/min at 1000 Upm/s. 3) 10 s at 4000 U/min at 1000 Upm/s. After coating, the films are tried at 70 °C for 1 min.
- Photoluminescence spectroscopy and TCSPC (Time-correlated single-photon counting) Steady-state emission spectroscopy is measured by a Horiba Scientific, Modell FluoroMax-4 equipped with a 150 W Xenon-Arc lamp, excitation- and emissions monochromators and a Hamamatsu R928 photomultiplier and a time-correlated single-photon counting option. Emissions and excitation spectra are corrected using standard correction fits.
- Excited state lifetimes are determined employing the same system using the TCSPC method with FM-2013 equipment and a Horiba Yvon TCSPC hub.
-
- NanoLED 370 (wavelength: 371 nm, puls duration: 1,1 ns)
- NanoLED 290 (wavelength: 294 nm, puls duration: <1 ns)
- SpectraLED 310 (wavelength: 314 nm)
- SpectraLED 355 (wavelength: 355 nm).
- Data analysis (exponential fit) is done using the software suite DataStation and DAS6 analysis software. The fit is specified using the chi-squared-test.
- For photoluminescence quantum yield (PLQY) measurements an Absolute PL Quantum Yield Measurement C9920-03G system (Hamamatsu Photonics) is used. Quantum yields and CIE coordinates are determined using the software U6039-05 version 3.6.0.
- Emission maxima are given in nm, quantum yields Φ in % and CIE coordinates as x,y values. PLQY is determined using the following protocol:
- 1) Quality assurance: Anthracene in ethanol (known concentration) is used as reference
- 2) Excitation wavelength: the absorption maximum of the organic molecule is determined and the molecule is excited using this wavelength
- 3) Measurement
Quantum yields are measured for sample of solutions or films under nitrogen atmosphere. The yield is calculated using the equation: - OLED devices comprising organic molecules according to the invention can be produced via vacuum-deposition methods. If a layer contains more than one compound, the weight-percentage of one or more compounds is given in %. The total weight-percentage values amount to 100 %, thus if a value is not given, the fraction of this compound equals to the difference between the given values and 100 %.
The not fully optimized OLEDs are characterized using standard methods and measuring electroluminescence spectra, the external quantum efficiency (in %) in dependency on the intensity, calculated using the light detected by the photodiode, and the current. The OLED device lifetime is extracted from the change of the luminance during operation at constant current density. The LT50 value corresponds to the time, where the measured luminance decreased to 50 % of the initial luminance, analogously LT80 corresponds to the time point, at which the measured luminance decreased to 80 % of the initial luminance, LT 95 to the time point, at which the measured luminance decreased to 95 % of the initial luminance etc.
Accelerated lifetime measurements are performed (e.g. applying increased current densities). Exemplarily LT80 values at 500 cd/m2 are determined using the following equation:
The values correspond to the average of several pixels (typically two to eight), the standard deviation between these pixels is given. -
-
MS (HPLC-MS): Molecular Formula Retention Time m/z calculated m/z found C60H38N4 9.23 min 814.31 814.49 -
Figure 1 depicts the emission spectrum of example 1 (10 % by weight in PMMA). The emission maximum (λmax) is at 464 nm. The photoluminescence quantum yield (PLQY) is 64 %, the full width at half maximum (FWHM) is 0.41 eV and the emission lifetime is 150 µs. The resulting CIEx coordinate is determined at 0.17 and the CIEy coordinate at 0.20. In mCBP (10 % by weight) the emission lifetime is beneficially reduced to 9.4 µs and the FWHM to 0.39 eV (PLQY = 68 %; λmax = 470 nm). -
-
MS (HPLC-MS): Molecular Formula Retention Time m/z calculated m/z found C60H38N4 9.33 min 814.31 814.35 -
Figure 2 depicts the emission spectrum of example 2 (10 % by weight in PMMA). The emission maximum (λmax) is at 496 nm. The photoluminescence quantum yield (PLQY) is 76 %, the full width at half maximum (FWHM) is 0.43 eV and the emission lifetime is 121 µs. The resulting CIEx coordinate is determined at 0.22 and the CIEy coordinate at 0.42. In mCBP (10 % by weight) the emission lifetime is beneficially reduced to 5.4 µs and the FWHM to 0.39 eV (PLQY = 81 %; λmax = 501 nm). -
-
MS (HPLC-MS): Molecular Formula Retention Time m/z calculated m/z found C36H22N4 4.75 min 510.18 510.28 -
Figure 3 depicts the emission spectrum of example 3 (10 % by weight in PMMA). The emission maximum (λmax) is at 480 nm. The photoluminescence quantum yield (PLQY) is 76 %, the full width at half maximum (FWHM) is 0.43 eV and the emission lifetime is 130 µs. The resulting CIEx coordinate is determined at 0.18 and the CIEy coordinate at 0.32. In mCBP (10 % by weight) the emission lifetime is beneficially reduced to 7.9 µs and the FWHM to 0.40 eV (PLQY = 79 %; λmax = 488 nm). -
-
MS (HPLC-MS): Molecular Formula Retention Time m/z calculated m/z found C48H30N4 7.01 min 662.25 662.35 -
Figure 4 depicts the emission spectrum of example 4 (10 % by weight in PMMA). The emission maximum is at 489 nm. The photoluminescence quantum yield (PLQY) is 79 %, the full width at half maximum is 0.43 eV and the emission lifetime is 26 µs. The resulting CIEx coordinate is determined at 0.20 and the CIEy coordinate at 0.39. -
-
MS (HPLC-MS): Molecular Formula Retention Time m/z calculated m/z found C60H38N4 8.80 min 814.31 814.68 -
Figure 5 depicts the emission spectrum of example 5 (10 % by weight in PMMA). The emission maximum is at 472 nm. The photoluminescence quantum yield (PLQY) is 66 %, the full width at half maximum is 0.44 eV and the emission lifetime is 650 µs. The resulting CIEx coordinate is determined at 0.17 and the CIEy coordinate at 0.24. -
-
MS (HPLC-MS): Molecular Formula Retention Time m/z calculated m/z found C60H38N4 8.90 min 814.31 814.95 -
Figure 6 depicts the emission spectrum of example 6 (10 % by weight in PMMA). The emission maximum is at 434 nm. The photoluminescence quantum yield (PLQY) is 50 %, the full width at half maximum is 0.40 eV and the emission lifetime is 437 µs. The resulting CIEx coordinate is determined at 0.17 and the CIEy coordinate at 0.11. -
-
MS (HPLC-MS): Molecular Formula Retention Time m/z calculated m/z found C60H38N4 11.25 min 734.43 735.20 -
Figure 7 depicts the emission spectrum of example 7 (10 % by weight in PMMA). The emission maximum is at 464 nm. The photoluminescence quantum yield (PLQY) is 79 %, the full width at half maximum is 0.39 eV and the emission lifetime is 8 µs. The resulting CIEx coordinate is determined at 0.16 and the CIEy coordinate at 0.20. The energy of the highest occupied molecular orbital EHOMO is determined at -5.78 eV. -
- Device D1 yielded an external quantum efficiency (EQE) at 1000 cd/m2 of 8.0 %. The emission maximum is at 468 nm with a FWHM of 59 nm at 6.0 V. The corresponding CIEx value is 0.14 and CIEy is 0.17.
-
Layer Thickness D2 8 100 nm Al 7 2 nm Liq 6 30 nm NBPhen 5 50 nm Example 1 (10%) : mCBP (70%) : T2T (20%) 4 10 nm mCBP 3 10 nm TCTA 2 100 nm NPB 1 130 nm ITO substrate glass - Device D2 yielded an external quantum efficiency (EQE) at 1000 cd/m2 of 8.6%. The emission maximum is at 475 nm with a FWHM of 64 nm at 8.0 V. The corresponding CIEx value is 0.17 and CIEy is 0.26.
-
Layer Thickness D3 9 100 nm Al 8 2 nm Liq 7 30 nm NBPhen 6 10 nm DPEPO 5 40 nm Example 3 (20%) : DPEPO (80%) 4 10 nm CzSi 3 10 nm TCTA 2 90 nm NPB 1 130 nm ITO Substrate glass - Device D3 yielded an external quantum efficiency (EQE) at 1000 cd/m2 of 14.5%. The emission maximum is at 478 nm with a FWHM of 69 nm at 10.0 V. The corresponding CIEy value is 0.32.
-
- Device D4 yielded an external quantum efficiency (EQE) at 1000 cd/m2 of 18.9 %. The emission maximum is at 486 nm with a FWHM of 70 nm at 7.0 V. The corresponding CIEy value is 0.37.
-
Layer Thickness D5 9 100 nm Al 8 2 nm Liq 7 30 nm NBPhen 6 10 nm DPEPO 5 30 nm Example 7 (20%) : DPEPO (80%) 4 10 nm CzSi 3 10 nm TCTA 2 90 nm NPB 1 130 nm ITO substrate glass - Device D5 yielded an external quantum efficiency (EQE) at 1000 cd/m2 of 8.1 %. The emission maximum is at 462 nm with a FWHM of 59 nm at 10 V. The corresponding CIEx value is 0.15 and CIEy is 0.17.
-
-
- Figure 1
- Emission spectrum of example 1 (10% by weight) in PMMA.
- Figure 2
- Emission spectrum of example 2 (10% by weight) in PMMA.
- Figure 3
- Emission spectrum of example 3 (10% by weight) in PMMA.
- Figure 4
- Emission spectrum of example 4 (10% by weight) in PMMA.
- Figure 5
- Emission spectrum of example 5 (10% by weight) in PMMA.
- Figure 6
- Emission spectrum of example 6 (10% by weight) in PMMA.
- Figure 7
- Emission spectrum of example 7 (10% by weight) in PMMA.
Claims (15)
- Organic molecules, comprising- two second chemical moieties, independently from another comprising a structure of formula II,
whereinLT is N or C-R1;LV is N or C-R1;LW is N or C-W;X is the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties or is R2;Y is the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties or is R2;W is the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties or is R2;RT is selected from the group consisting of CN and RI;RV is selected from the group consisting of CN and RI;RW is the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties or is selected from the group consisting of CN and RI;RX is the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties or is RI;RY is the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties or is RI;# represents the binding site of a single bond linking the second chemical moieties to the first chemical moiety;Z is at each occurrence independently from another selected from the group consisting of a direct bond, CR3R4, C=CR3R4, C=O, C=NR3, NR3, O, SiR3R4, S, S(O) and S(O)2;R1 is at each occurrence independently from another selected from the group consisting of:hydrogen, deuterium,C1-C5-alkyl,
wherein one or more hydrogen atoms are optionally substituted by deuterium;C2-C8-alkenyl,
wherein one or more hydrogen atoms are optionally substituted by deuterium;C2-C8-alkynyl,
wherein one or more hydrogen atoms are optionally substituted by deuterium; andC6-C18-aryl,
which is optionally substituted with one or more substituents R6;R2 is at each occurrence independently from another selected from the group consisting of:BBhydrogen, deuterium,C1-C5-alkyl,
wherein one or more hydrogen atoms are optionally substituted by deuterium;C2-C8-alkenyl,
wherein one or more hydrogen atoms are optionally substituted by deuterium;C2-C8-alkynyl, wherein one or more hydrogen atoms are optionally substituted by deuterium; andC6-C18-aryl,
which is optionally substituted with one or more substituents R6;RI is at each occurrence independently from another selected from the group consisting of:hydrogen, deuterium,C1-C5-alkyl,
wherein one or more hydrogen atoms are optionally substituted by deuterium;C2-C8-alkenyl,
wherein one or more hydrogen atoms are optionally substituted by deuterium;C2-C8-alkynyl,
wherein one or more hydrogen atoms are optionally substituted by deuterium; andC6-C18-aryl,
which is optionally substituted with one or more substituents R6;Ra, R3 and R4 is at each occurrence independently from another selected from the group consisting of: hydrogen, deuterium, N(R5)2, OR5, Si(R5)3, B(OR5)2, OSO2R5, CF3, CN, F, Br, I,
C1-C40-alkyl,
which is optionally substituted with one or more substituents R5 and
wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
C1-C40-alkoxy,
which is optionally substituted with one or more substituents R5 and
wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
C1-C40-thioalkoxy,
which is optionally substituted with one or more substituents R5 and
wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
C2-C40-alkenyl,
which is optionally substituted with one or more substituents R5 and
wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
C2-C40-alkynyl,
which is optionally substituted with one or more substituents R5 and
wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
C6-C60-aryl,
which is optionally substituted with one or more substituents R5; and
C3-C57-heteroaryl,
which is optionally substituted with one or more substituents R5;R5 is at each occurrence independently from another selected from the group consisting of hydrogen, deuterium, N(R6)2, OR6, Si(R6)3, B(OR6)2, OSO2R6, CF3, CN, F, Br, I,
C1-C40-alkyl,
which is optionally substituted with one or more substituents R6 and
wherein one or more non-adjacent CH2-groups are optionally substituted by R6C=CR6, C≡C, Si(R6)2, Ge(R6)2, Sn(R6)2, C=O, C=S, C=Se, C=NR6, P(=O)(R6), SO, SO2, NR6, O, S or CONR6;
C1-C40-alkoxy,
which is optionally substituted with one or more substituents R6 and
wherein one or more non-adjacent CH2-groups are optionally substituted by R6C=CR6, C≡C, Si(R6)2, Ge(R6)2, Sn(R6)2, C=O, C=S, C=Se, C=NR6, P(=O)(R6), SO, SO2, NR6, O, S or CONR6;
C1-C40-thioalkoxy,
which is optionally substituted with one or more substituents R6 and
wherein one or more non-adjacent CH2-groups are optionally substituted by R6C=CR6, C≡C, Si(R6)2, Ge(R6)2, Sn(R6)2, C=O, C=S, C=Se, C=NR6, P(=O)(R6), SO, SO2, NR6, O, S or CONR6;
C2-C40-alkenyl,
which is optionally substituted with one or more substituents R6 and
wherein one or more non-adjacent CH2-groups are optionally substituted by R6C=CR6, C≡C, Si(R6)2, Ge(R6)2, Sn(R6)2, C=O, C=S, C=Se, C=NR6, P(=O)(R6), SO, SO2, NR6, O, S or CONR6;
C2-C40-alkynyl,
which is optionally substituted with one or more substituents R6 and
wherein one or more non-adjacent CH2-groups are optionally substituted by R6C=CR6, C≡C, Si(R6)2, Ge(R6)2, Sn(R6)2, C=O, C=S, C=Se, C=NR6, P(=O)(R6), SO, SO2, NR6, O, S or CONR6;
C6-C60-aryl,
which is optionally substituted with one or more substituents R6; and
C3-C57-heteroaryl,
which is optionally substituted with one or more substituents R6;R6 is at each occurrence independently from another selected from the group consisting of: hydrogen, deuterium, OPh, CF3, CN, F,wherein the substituents Ra, R3, R4 or R5 independently from each other optionally form a mono- or polycyclic, aliphatic, aromatic and/or benzo-fused ring system with one or more substituents Ra, R3, R4 or R5;
C1-C5-alkyl, wherein one or more hydrogen atoms are optionally, independently from each other substituted by deuterium, CN, CF3, or F;
C1-C5-alkoxy, wherein one or more hydrogen atoms are optionally, independently from each other substituted by deuterium, CN, CF3, or F;
C1-C5-thioalkoxy, wherein one or more hydrogen atoms are optionally, independently from each other substituted by deuterium, CN, CF3, or F;
C2-C5-alkenyl, wherein one or more hydrogen atoms are optionally, independently from each other substituted by deuterium, CN, CF3, or F; C2-C5-alkynyl, wherein one or more hydrogen atoms are optionally, independently from each other substituted by deuterium, CN, CF3, or F;
C6-C18-aryl, which is optionally substituted with one or more C1-C5-alkyl substituents;
C3-C17-heteroaryl, which is optionally substituted with one or more C1-C5-alkyl substituents;
N(C6-C18-aryl)2;
N(C3-C17-heteroaryl)2,
and N(C3-C17-heteroaryl)(C6-C18-aryl);
wherein
exactly one ring atom selected from the group consisting of LT, LV and LW is N,
exactly one substituent selected from the group consisting of RT, RV and RW is CN,
exactly one substituent selected from the group consisting of LW, Y and X represents the binding site of a single bond linking the first chemical moiety and one of the two second chemical moieties, and
exactly one substituent selected from the group consisting of RW, RY and RX represents the binding site of a single bond linking the first chemical moiety and one of the two second chemical moieties. - The organic molecule according to claim 1, wherein the first chemical moiety comprises a structure of formula la:YD is the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties;RD is the binding site of a single bond linking the first chemical moiety to one of the two second chemical moieties;LZ is N or C-R2;RZ is CN or RI;wherein exactly one substituent selected from the group consisting of RT, RV and RZ is CN and exactly one ring atom selected from the group consisting of LT, LV and LZ is N; and wherein apart from that the definitions in claim 1 apply.
- The organic molecule according to claim 1 or 2, wherein R1, R2 and RI is at each occurrence independently from another selected from the group consisting of H, methyl, mesityl, tolyl and phenyl.
- The organic molecule according to one or more of claims 1 to 3, wherein RV is CN.
- The organic molecule according to one or more of claims 1 to 5, wherein the two second chemical moieties, each at each occurrence independently from another comprise a structure of formula IIb:
Rb is at each occurrence independently from another selected from the group consisting of: deuterium, N(R5)2, OR5, Si(R5)3, B(OR5)2, OSO2R5, CF3, CN, F, Br, I,
C1-C40-alkyl,
which is optionally substituted with one or more substituents R5 and
wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
C1-C40-alkoxy,
which is optionally substituted with one or more substituents R5 and
wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
C1-C40-thioalkoxy,
which is optionally substituted with one or more substituents R5 and
wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
C2-C40-alkenyl,
which is optionally substituted with one or more substituents R5 and
wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
C2-C40-alkynyl,
which is optionally substituted with one or more substituents R5 and
wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
C6-C60-aryl,
which is optionally substituted with one or more substituents R5; and
C3-C57-heteroaryl,
which is optionally substituted with one or more substituents R5; and wherein apart from that the definitions in claim 1 apply. - The organic molecule according to one or more of claims 1 to 5, wherein the two second chemical moieties, each at each occurrence independently from another comprise a structure of formula IIc:
Rb is at each occurrence independently from another selected from the group consisting of deuterium, N(R5)2, OR5, Si(R5)3, B(OR5)2, OSO2R5, CF3, CN, F, Br, I,
C1-C40-alkyl,
which is optionally substituted with one or more substituents R5 and
wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
C1-C40-alkoxy,
which is optionally substituted with one or more substituents R5 and
wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
C1-C40-thioalkoxy,
which is optionally substituted with one or more substituents R5 and
wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
C2-C40-alkenyl,
which is optionally substituted with one or more substituents R5 and
wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
C2-C40-alkynyl,
which is optionally substituted with one or more substituents R5 and
wherein one or more non-adjacent CH2-groups are optionally substituted by R5C=CR5, C≡C, Si(R5)2, Ge(R5)2, Sn(R5)2, C=O, C=S, C=Se, C=NR5, P(=O)(R5), SO, SO2, NR5, O, S or CONR5;
C6-C60-aryl,
which is optionally substituted with one or more substituents R5; and
C3-C57-heteroaryl,
which is optionally substituted with one or more substituents R5;
and wherein apart from that the definitions in claim 1 apply. - The organic molecule according to claim 6 or 7, wherein Rb is at each occurrence independently from another selected from the group consisting of- Me, iPr, tBu, CN, CF3,- Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3 and Ph;- pyridinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3 and Ph;- pyrimidinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3 and Ph;- carbazolyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3 and Ph;- triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, iPr, tBu, CN, CF3, and Ph;
and- N(Ph)2. - Process for preparing an organic molecule according to any of claims 1 to 8 comprising providing a halo-fluoropyridine, with either one R1 and two R2 or two R1 and one R2, as a reactant.
- Use of an organic molecule according to one or more of claims 1 to 8 as luminescent emitter and/or as a host material and/or as an electron transport material and/or as a hole injection material and/or as a hole blocking material in an optoelectronic device.
- Use according to claim 10, wherein the optoelectronic device is selected from the group consisting of:• organic light-emitting diodes (OLEDS),• light-emitting electrochemical cells,• OLED-sensors,• organic diodes,• organic solar cells,• organic transistors,• organic field-effect transistors,• organic lasers, and• down-conversion elements.
- Composition, comprising:(a) at least an organic molecule according to one or more of claims 1 to 8, in particular in the form of an emitter and/or a host, and(b) one or more emitter and/or host materials, which differ from the organic molecule of one or more of claims 1 to 8, and(c) optionally, one or more dyes and/or one or more solvents.
- Optoelectronic device, comprising one organic molecule according to one or more of claims 1 to 8 or a composition according to claim 12, in particular in form of a device selected from the group consisting of organic light-emitting diode (OLED), light-emitting electrochemical cell OLED-sensor, organic diode, organic solar cell, organic transistor, organic field-effect transistor, organic laser and down-conversion element.
- Optoelectronic device according to claim 13, comprising or consisting of- a substrate,- an anode and- a cathode, wherein the anode or the cathode are disposed on the substrate, and- at least a light-emitting layer, which is arranged between the anode and the cathode and which comprises the organic molecule according to claims 1 to 8 or a composition according to claim 12.
- Process for producing an optoelectronic device, wherein an organic molecule according to any one of claims 1 to 8 or a composition according to claim 12 is used, in particular comprising the processing of the organic compound by vacuum evaporation method or from a solution.
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US20140326970A1 (en) | 2013-05-03 | 2014-11-06 | Zachary M. Hudson | Host Materials for Single-Layer Phosphorescent OLEDs |
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